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1690738155 = 325156723977
BaseRepresentation
bin110010011000110…
…1001110111101011
311100211102101201200
41210301221313223
511430312110110
6435434215243
756620015521
oct14461516753
94324371650
101690738155
11798417667
123b2284523
1320c3859a2
14120794311
159d6746c0
hex64c69deb

1690738155 has 24 divisors (see below), whose sum is σ = 2932605312. Its totient is φ = 901113984.

The previous prime is 1690738141. The next prime is 1690738157. The reversal of 1690738155 is 5518370961.

It is a happy number.

It is not a de Polignac number, because 1690738155 - 211 = 1690736107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1690738155.

It is not an unprimeable number, because it can be changed into a prime (1690738157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58527 + ... + 82503.

It is an arithmetic number, because the mean of its divisors is an integer number (122191888).

Almost surely, 21690738155 is an apocalyptic number.

1690738155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1690738155 is a deficient number, since it is larger than the sum of its proper divisors (1241867157).

1690738155 is a wasteful number, since it uses less digits than its factorization.

1690738155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555 (or 25552 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 1690738155 is about 41118.5864907830. The cubic root of 1690738155 is about 1191.3118210157.

The spelling of 1690738155 in words is "one billion, six hundred ninety million, seven hundred thirty-eight thousand, one hundred fifty-five".

Divisors: 1 3 5 9 15 45 1567 4701 7835 14103 23505 23977 70515 71931 119885 215793 359655 1078965 37571959 112715877 187859795 338147631 563579385 1690738155