157816728312 has 32 divisors (see below), whose sum is σ = 394568378880. Its totient is φ = 52602035040.

The previous prime is 157816728247. The next prime is 157816728313. The reversal of 157816728312 is 213827618751.

It is a super-2 number, since 2×157816728312² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157816728313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155763 + ... + 583005.

It is an arithmetic number, because the mean of its divisors is an integer number (12330261840).

Almost surely, 2^157816728312 is an apocalyptic number.

157816728312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157816728312 is an abundant number, since it is smaller than the sum of its proper divisors (236751650568).

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

157816728312 is a wasteful number, since it uses less digits than its factorization.

157816728312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442643 (or 442639 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The spelling of 157816728312 in words is "one hundred fifty-seven billion, eight hundred sixteen million, seven hundred twenty-eight thousand, three hundred twelve".