31376747808 has 216 divisors, whose sum is σ = 103935964860. Its totient is φ = 8952652800.

The previous prime is 31376747797. The next prime is 31376747837. The reversal of 31376747808 is 80874767313.

It can be written as a sum of positive squares in 2 ways, for example, as 23039596944 + 8337150864 = 151788^2 + 91308^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18358858 + ... + 18360566.

Almost surely, 2^31376747808 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 31376747808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51967982430).

31376747808 is an abundant number, since it is smaller than the sum of its proper divisors (72559217052).

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

31376747808 is a wasteful number, since it uses less digits than its factorization.

31376747808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040 (or 3022 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 31376747808 in words is "thirty-one billion, three hundred seventy-six million, seven hundred forty-seven thousand, eight hundred eight".