64999425615 has 32 divisors (see below), whose sum is σ = 107762282496. Its totient is φ = 33420468480.

The previous prime is 64999425611. The next prime is 64999425637. The reversal of 64999425615 is 51652499946.

It is not a de Polignac number, because 64999425615 - 2² = 64999425611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64999425611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143454 + ... + 388043.

It is an arithmetic number, because the mean of its divisors is an integer number (3367571328).

Almost surely, 2^64999425615 is an apocalyptic number.

64999425615 is a deficient number, since it is larger than the sum of its proper divisors (42762856881).

64999425615 is a wasteful number, since it uses less digits than its factorization.

64999425615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531799.

The product of its digits is 20995200, while the sum is 60.

The spelling of 64999425615 in words is "sixty-four billion, nine hundred ninety-nine million, four hundred twenty-five thousand, six hundred fifteen".