64494286938 has 32 divisors (see below), whose sum is σ = 143569096320. Its totient is φ = 21460826880.

The previous prime is 64494286919. The next prime is 64494286943. The reversal of 64494286938 is 83968249446.

64494286938 is a `hidden beast` number, since 64 + 494 + 2 + 86 + 9 + 3 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003798 + ... + 1066113.

It is an arithmetic number, because the mean of its divisors is an integer number (4486534260).

Almost surely, 2^64494286938 is an apocalyptic number.

64494286938 is an abundant number, since it is smaller than the sum of its proper divisors (79074809382).

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

64494286938 is a wasteful number, since it uses less digits than its factorization.

64494286938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070499 (or 2070493 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

The spelling of 64494286938 in words is "sixty-four billion, four hundred ninety-four million, two hundred eighty-six thousand, nine hundred thirty-eight".