64913605779 has 16 divisors (see below), whose sum is σ = 95045094144. Its totient is φ = 39081036000.

The previous prime is 64913605769. The next prime is 64913605781. The reversal of 64913605779 is 97750631946.

It is a happy number.

It is not a de Polignac number, because 64913605779 - 2⁴ = 64913605763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64913605759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6508524 + ... + 6518489.

It is an arithmetic number, because the mean of its divisors is an integer number (5940318384).

Almost surely, 2^64913605779 is an apocalyptic number.

64913605779 is a deficient number, since it is larger than the sum of its proper divisors (30131488365).

64913605779 is a wasteful number, since it uses less digits than its factorization.

64913605779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027178.

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 64913605779 in words is "sixty-four billion, nine hundred thirteen million, six hundred five thousand, seven hundred seventy-nine".