15857145738 has 64 divisors (see below), whose sum is σ = 40954752000. Its totient is φ = 4453816752.

The previous prime is 15857145727. The next prime is 15857145769. The reversal of 15857145738 is 83754175851.

15857145738 is a `hidden beast` number, since 1 + 5 + 8 + 57 + 14 + 573 + 8 = 666.

15857145738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333208 + ... + 377811.

It is an arithmetic number, because the mean of its divisors is an integer number (639918000).

Almost surely, 2^15857145738 is an apocalyptic number.

15857145738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15857145738 is an abundant number, since it is smaller than the sum of its proper divisors (25097606262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15857145738 is a wasteful number, since it uses less digits than its factorization.

15857145738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711096 (or 711090 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 54.

The spelling of 15857145738 in words is "fifteen billion, eight hundred fifty-seven million, one hundred forty-five thousand, seven hundred thirty-eight".