157516521939 has 40 divisors (see below), whose sum is σ = 269388607488. Its totient is φ = 89851621680.

The previous prime is 157516521853. The next prime is 157516521979. The reversal of 157516521939 is 939125615751.

It is a happy number.

157516521939 is a `hidden beast` number, since 1 + 5 + 75 + 16 + 521 + 9 + 39 = 666.

It is not a de Polignac number, because 157516521939 - 2¹³ = 157516513747 is a prime.

It is a super-2 number, since 2×157516521939² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157516521979) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 80494 + ... + 567020.

Almost surely, 2^157516521939 is an apocalyptic number.

157516521939 is a deficient number, since it is larger than the sum of its proper divisors (111872085549).

157516521939 is an equidigital number, since it uses as much as digits as its factorization.

157516521939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487117 (or 487108 counting only the distinct ones).

The product of its digits is 2551500, while the sum is 54.

The spelling of 157516521939 in words is "one hundred fifty-seven billion, five hundred sixteen million, five hundred twenty-one thousand, nine hundred thirty-nine".