157321091256 has 64 divisors (see below), whose sum is σ = 451279745280. Its totient is φ = 44769792000.

The previous prime is 157321091243. The next prime is 157321091287. The reversal of 157321091256 is 652190123751.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1823241 + ... + 1907576.

It is an arithmetic number, because the mean of its divisors is an integer number (7051246020).

Almost surely, 2^157321091256 is an apocalyptic number.

It is an amenable number.

157321091256 is an abundant number, since it is smaller than the sum of its proper divisors (293958654024).

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

157321091256 is a wasteful number, since it uses less digits than its factorization.

157321091256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731084 (or 3731080 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 157321091256 in words is "one hundred fifty-seven billion, three hundred twenty-one million, ninety-one thousand, two hundred fifty-six".