31745455120 has 20 divisors (see below), whose sum is σ = 73808183340. Its totient is φ = 12698182016.

The previous prime is 31745455073. The next prime is 31745455127. The reversal of 31745455120 is 2155454713.

It can be written as a sum of positive squares in 2 ways, for example, as 18407976976 + 13337478144 = 135676^2 + 115488^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 31745455120.

It is not an unprimeable number, because it can be changed into a prime (31745455127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198409015 + ... + 198409174.

It is an arithmetic number, because the mean of its divisors is an integer number (3690409167).

Almost surely, 2^31745455120 is an apocalyptic number.

It is an amenable number.

31745455120 is an abundant number, since it is smaller than the sum of its proper divisors (42062728220).

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

31745455120 is a wasteful number, since it uses less digits than its factorization.

31745455120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396818202 (or 396818196 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 31745455120 in words is "thirty-one billion, seven hundred forty-five million, four hundred fifty-five thousand, one hundred twenty".