37721890944 has 64 divisors (see below), whose sum is σ = 111331980000. Its totient is φ = 12573962496.

The previous prime is 37721890933. The next prime is 37721890949. The reversal of 37721890944 is 44909812773.

37721890944 is a `hidden beast` number, since 377 + 2 + 189 + 0 + 94 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×37721890944² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (37721890949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5453994 + ... + 5460905.

Almost surely, 2^37721890944 is an apocalyptic number.

It is an amenable number.

37721890944 is an abundant number, since it is smaller than the sum of its proper divisors (73610089056).

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

37721890944 is a wasteful number, since it uses less digits than its factorization.

37721890944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914922 (or 10914904 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 37721890944 in words is "thirty-seven billion, seven hundred twenty-one million, eight hundred ninety thousand, nine hundred forty-four".