31402157856 has 24 divisors (see below), whose sum is σ = 82430664624. Its totient is φ = 10467385920.

The previous prime is 31402157837. The next prime is 31402157881. The reversal of 31402157856 is 65875120413.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163552810 + ... + 163553001.

It is an arithmetic number, because the mean of its divisors is an integer number (3434611026).

Almost surely, 2^31402157856 is an apocalyptic number.

It is an amenable number.

31402157856 is an abundant number, since it is smaller than the sum of its proper divisors (51028506768).

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

31402157856 is a wasteful number, since it uses less digits than its factorization.

31402157856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327105824 (or 327105816 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 31402157856 in words is "thirty-one billion, four hundred two million, one hundred fifty-seven thousand, eight hundred fifty-six".