31868747064 has 192 divisors, whose sum is σ = 108906819840. Its totient is φ = 8177748480.

The previous prime is 31868747059. The next prime is 31868747137. The reversal of 31868747064 is 46074786813.

31868747064 is a `hidden beast` number, since 31 + 8 + 6 + 87 + 470 + 64 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31868747064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 425524 + ... + 494780.

It is an arithmetic number, because the mean of its divisors is an integer number (567223020).

Almost surely, 2^31868747064 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 31868747064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54453409920).

31868747064 is an abundant number, since it is smaller than the sum of its proper divisors (77038072776).

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

31868747064 is a wasteful number, since it uses less digits than its factorization.

31868747064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69370 (or 69363 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 31868747064 in words is "thirty-one billion, eight hundred sixty-eight million, seven hundred forty-seven thousand, sixty-four".