64091566839 has 16 divisors (see below), whose sum is σ = 90489097728. Its totient is φ = 40211256192.

The previous prime is 64091566823. The next prime is 64091566853. The reversal of 64091566839 is 93866519046.

It is not a de Polignac number, because 64091566839 - 2⁴ = 64091566823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64091566879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762124 + ... + 842030.

It is an arithmetic number, because the mean of its divisors is an integer number (5655568608).

Almost surely, 2^64091566839 is an apocalyptic number.

64091566839 is a deficient number, since it is larger than the sum of its proper divisors (26397530889).

64091566839 is a wasteful number, since it uses less digits than its factorization.

64091566839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95654.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 64091566839 in words is "sixty-four billion, ninety-one million, five hundred sixty-six thousand, eight hundred thirty-nine".