40372858521 has 6 divisors (see below), whose sum is σ = 58316351210. Its totient is φ = 26915239008.

The previous prime is 40372858517. The next prime is 40372858523. The reversal of 40372858521 is 12585827304.

40372858521 is a `hidden beast` number, since 4 + 0 + 3 + 72 + 8 + 58 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30932015625 + 9440842896 = 175875^2 + 97164^2 .

It is not a de Polignac number, because 40372858521 - 2² = 40372858517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40372858523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2242936576 + ... + 2242936593.

Almost surely, 2^40372858521 is an apocalyptic number.

It is an amenable number.

40372858521 is a deficient number, since it is larger than the sum of its proper divisors (17943492689).

40372858521 is a wasteful number, since it uses less digits than its factorization.

40372858521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485873175 (or 4485873172 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 40372858521 in words is "forty billion, three hundred seventy-two million, eight hundred fifty-eight thousand, five hundred twenty-one".