157816728315 has 12 divisors (see below), whose sum is σ = 273548995824. Its totient is φ = 84168921744.

The previous prime is 157816728313. The next prime is 157816728317. The reversal of 157816728315 is 513827618751.

157816728315 is a `hidden beast` number, since 1 + 578 + 1 + 67 + 2 + 8 + 3 + 1 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (157816728313) and next prime (157816728317).

It is not a de Polignac number, because 157816728315 - 2¹ = 157816728313 is a prime.

It is a super-2 number, since 2×157816728315² (a number of 23 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1753519159 + ... + 1753519248.

It is an arithmetic number, because the mean of its divisors is an integer number (22795749652).

Almost surely, 2^157816728315 is an apocalyptic number.

157816728315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157816728315 is a deficient number, since it is larger than the sum of its proper divisors (115732267509).

157816728315 is a wasteful number, since it uses less digits than its factorization.

157816728315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507038418 (or 3507038415 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The spelling of 157816728315 in words is "one hundred fifty-seven billion, eight hundred sixteen million, seven hundred twenty-eight thousand, three hundred fifteen".