31071974544 has 140 divisors (see below), whose sum is σ = 97205312316. Its totient is φ = 9560560896.

The previous prime is 31071974533. The next prime is 31071974567. The reversal of 31071974544 is 44547917013.

It is a happy number.

31071974544 is a `hidden beast` number, since 3 + 1 + 0 + 7 + 197 + 454 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8210534544 + 22861440000 = 90612^2 + 151200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31071974544.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 49174 + ... + 254090.

Almost surely, 2^31071974544 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 31071974544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48602656158).

31071974544 is an abundant number, since it is smaller than the sum of its proper divisors (66133337772).

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

31071974544 is a wasteful number, since it uses less digits than its factorization.

31071974544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204956 (or 204935 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 31071974544 in words is "thirty-one billion, seventy-one million, nine hundred seventy-four thousand, five hundred forty-four".