37640044720 has 20 divisors (see below), whose sum is σ = 87513104160. Its totient is φ = 15056017856.

The previous prime is 37640044691. The next prime is 37640044747. The reversal of 37640044720 is 2744004673.

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 37640044720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235250200 + ... + 235250359.

It is an arithmetic number, because the mean of its divisors is an integer number (4375655208).

Almost surely, 2^37640044720 is an apocalyptic number.

It is an amenable number.

37640044720 is an abundant number, since it is smaller than the sum of its proper divisors (49873059440).

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

37640044720 is a wasteful number, since it uses less digits than its factorization.

37640044720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470500572 (or 470500566 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 37.

The spelling of 37640044720 in words is "thirty-seven billion, six hundred forty million, forty-four thousand, seven hundred twenty".