64021912038 has 48 divisors (see below), whose sum is σ = 159594458400. Its totient is φ = 18169204608.

The previous prime is 64021912021. The next prime is 64021912063. The reversal of 64021912038 is 83021912046.

64021912038 is a `hidden beast` number, since 640 + 2 + 1 + 9 + 1 + 2 + 0 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64021911993 and 64021912011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1686295 + ... + 1723842.

It is an arithmetic number, because the mean of its divisors is an integer number (3324884550).

Almost surely, 2^64021912038 is an apocalyptic number.

64021912038 is an abundant number, since it is smaller than the sum of its proper divisors (95572546362).

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

64021912038 is a wasteful number, since it uses less digits than its factorization.

64021912038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410301 (or 3410298 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 64021912038 in words is "sixty-four billion, twenty-one million, nine hundred twelve thousand, thirty-eight".