64912838040 has 96 divisors (see below), whose sum is σ = 222070258800. Its totient is φ = 16399031040.

The previous prime is 64912838017. The next prime is 64912838069. The reversal of 64912838040 is 4083821946.

It is a happy number.

64912838040 is a `hidden beast` number, since 6 + 491 + 2 + 83 + 80 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4738251 + ... + 4751930.

Almost surely, 2^64912838040 is an apocalyptic number.

64912838040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64912838040 is an abundant number, since it is smaller than the sum of its proper divisors (157157420760).

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

64912838040 is a wasteful number, since it uses less digits than its factorization.

64912838040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9490217 (or 9490210 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 64912838040 in words is "sixty-four billion, nine hundred twelve million, eight hundred thirty-eight thousand, forty".