31351912704 has 576 divisors, whose sum is σ = 110654638080. Its totient is φ = 8569774080.

The previous prime is 31351912687. The next prime is 31351912723. The reversal of 31351912704 is 40721915313.

31351912704 is a `hidden beast` number, since 3 + 13 + 519 + 127 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148587159 + ... + 148587369.

Almost surely, 2^31351912704 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 31351912704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55327319040).

31351912704 is an abundant number, since it is smaller than the sum of its proper divisors (79302725376).

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

31351912704 is a wasteful number, since it uses less digits than its factorization.

31351912704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 31351912704 in words is "thirty-one billion, three hundred fifty-one million, nine hundred twelve thousand, seven hundred four".