31471601656 has 64 divisors (see below), whose sum is σ = 65556027360. Its totient is φ = 14043456000.

The previous prime is 31471601639. The next prime is 31471601677. The reversal of 31471601656 is 65610617413.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 2898670 + ... + 2909506.

Almost surely, 2^31471601656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31471601656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32778013680).

31471601656 is an abundant number, since it is smaller than the sum of its proper divisors (34084425704).

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

31471601656 is a wasteful number, since it uses less digits than its factorization.

31471601656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456 (or 11452 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 31471601656 in words is "thirty-one billion, four hundred seventy-one million, six hundred one thousand, six hundred fifty-six".