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7130920168 = 23891365021
BaseRepresentation
bin1101010010000100…
…10011010011101000
3200101222002021111101
412221002103103220
5104101003421133
63135332211144
7341465551501
oct65102232350
920358067441
107130920168
11302a244959
121470169ab4
138984844b8
144b90b9ba8
152bb07a37d
hex1a90934e8

7130920168 has 8 divisors (see below), whose sum is σ = 13370475330. Its totient is φ = 3565460080.

The previous prime is 7130920163. The next prime is 7130920213. The reversal of 7130920168 is 8610290317.

It can be written as a sum of positive squares in only one way, i.e., 4103939844 + 3026980324 = 64062^2 + 55018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7130920163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445682503 + ... + 445682518.

Almost surely, 27130920168 is an apocalyptic number.

It is an amenable number.

7130920168 is a deficient number, since it is larger than the sum of its proper divisors (6239555162).

7130920168 is a wasteful number, since it uses less digits than its factorization.

7130920168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891365027 (or 891365023 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 7130920168 is about 84444.7758478877. The cubic root of 7130920168 is about 1924.7833718561.

The spelling of 7130920168 in words is "seven billion, one hundred thirty million, nine hundred twenty thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 891365021 1782730042 3565460084 7130920168