157680710257 has 4 divisors (see below), whose sum is σ = 180206526016. Its totient is φ = 135154894500.

The previous prime is 157680710191. The next prime is 157680710267. The reversal of 157680710257 is 752017086751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157680710257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157680710257.

It is not an unprimeable number, because it can be changed into a prime (157680710267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11262907869 + ... + 11262907882.

It is an arithmetic number, because the mean of its divisors is an integer number (45051631504).

Almost surely, 2^157680710257 is an apocalyptic number.

It is an amenable number.

157680710257 is a deficient number, since it is larger than the sum of its proper divisors (22525815759).

157680710257 is an equidigital number, since it uses as much as digits as its factorization.

157680710257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22525815758.

The product of its (nonzero) digits is 823200, while the sum is 49.

The spelling of 157680710257 in words is "one hundred fifty-seven billion, six hundred eighty million, seven hundred ten thousand, two hundred fifty-seven".