1639735545 has 96 divisors (see below), whose sum is σ = 3210854400. Its totient is φ = 699229440.

The previous prime is 1639735543. The next prime is 1639735553. The reversal of 1639735545 is 5455379361.

1639735545 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1639735545 - 2¹ = 1639735543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1639735494 and 1639735503.

It is not an unprimeable number, because it can be changed into a prime (1639735543) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2737156 + ... + 2737754.

It is an arithmetic number, because the mean of its divisors is an integer number (33446400).

Almost surely, 2^1639735545 is an apocalyptic number.

1639735545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1639735545 is a deficient number, since it is larger than the sum of its proper divisors (1571118855).

1639735545 is a wasteful number, since it uses less digits than its factorization.

1639735545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 674 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 48.

The square root of 1639735545 is about 40493.6482056137. The cubic root of 1639735545 is about 1179.2103174264.

The spelling of 1639735545 in words is "one billion, six hundred thirty-nine million, seven hundred thirty-five thousand, five hundred forty-five".