64677933638 has 8 divisors (see below), whose sum is σ = 97021837560. Its totient is φ = 32337321120.

The previous prime is 64677933623. The next prime is 64677933653. The reversal of 64677933638 is 83633977646.

It is an interprime number because it is at equal distance from previous prime (64677933623) and next prime (64677933653).

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 773123 + ... + 852686.

It is an arithmetic number, because the mean of its divisors is an integer number (12127729695).

Almost surely, 2^64677933638 is an apocalyptic number.

64677933638 is a deficient number, since it is larger than the sum of its proper divisors (32343903922).

64677933638 is a wasteful number, since it uses less digits than its factorization.

64677933638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645702.

The product of its digits is 82301184, while the sum is 62.

The spelling of 64677933638 in words is "sixty-four billion, six hundred seventy-seven million, nine hundred thirty-three thousand, six hundred thirty-eight".