64938784911 has 32 divisors (see below), whose sum is σ = 116254053888. Its totient is φ = 31139475840.

The previous prime is 64938784909. The next prime is 64938784919. The reversal of 64938784911 is 11948783946.

It is not a de Polignac number, because 64938784911 - 2¹ = 64938784909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64938784919) 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, 10809316 + ... + 10815321.

It is an arithmetic number, because the mean of its divisors is an integer number (3632939184).

Almost surely, 2^64938784911 is an apocalyptic number.

64938784911 is a deficient number, since it is larger than the sum of its proper divisors (51315268977).

64938784911 is a wasteful number, since it uses less digits than its factorization.

64938784911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21624671.

The product of its digits is 10450944, while the sum is 60.

The spelling of 64938784911 in words is "sixty-four billion, nine hundred thirty-eight million, seven hundred eighty-four thousand, nine hundred eleven".