157816728313 has 2 divisors, whose sum is σ = 157816728314. Its totient is φ = 157816728312.

The previous prime is 157816728247. The next prime is 157816728317. The reversal of 157816728313 is 313827618751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132810682624 + 25006045689 = 364432^2 + 158133^2 .

It is a cyclic number.

It is not a de Polignac number, because 157816728313 - 2²⁵ = 157783173881 is a prime.

It is a super-2 number, since 2×157816728313² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157816728317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78908364156 + 78908364157.

It is an arithmetic number, because the mean of its divisors is an integer number (78908364157).

Almost surely, 2^157816728313 is an apocalyptic number.

It is an amenable number.

157816728313 is a deficient number, since it is larger than the sum of its proper divisors (1).

157816728313 is an equidigital number, since it uses as much as digits as its factorization.

157816728313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The spelling of 157816728313 in words is "one hundred fifty-seven billion, eight hundred sixteen million, seven hundred twenty-eight thousand, three hundred thirteen".