64788765 has 32 divisors (see below), whose sum is σ = 109641600. Its totient is φ = 32578560.

The previous prime is 64788743. The next prime is 64788781. The reversal of 64788765 is 56788746.

It is not a de Polignac number, because 64788765 - 2⁷ = 64788637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79681 + ... + 80489.

It is an arithmetic number, because the mean of its divisors is an integer number (3426300).

Almost surely, 2^64788765 is an apocalyptic number.

It is an amenable number.

64788765 is a deficient number, since it is larger than the sum of its proper divisors (44852835).

64788765 is a wasteful number, since it uses less digits than its factorization.

64788765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117.

The product of its digits is 2257920, while the sum is 51.

The square root of 64788765 is about 8049.1468492009. The cubic root of 64788765 is about 401.6365555002.

The spelling of 64788765 in words is "sixty-four million, seven hundred eighty-eight thousand, seven hundred sixty-five".