51964388278 has 16 divisors (see below), whose sum is σ = 87010140096. Its totient is φ = 23070869640.

The previous prime is 51964388249. The next prime is 51964388297. The reversal of 51964388278 is 87288346915.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27464376 + ... + 27466267.

It is an arithmetic number, because the mean of its divisors is an integer number (5438133756).

Almost surely, 2^51964388278 is an apocalyptic number.

51964388278 is a deficient number, since it is larger than the sum of its proper divisors (35045751818).

51964388278 is a wasteful number, since it uses less digits than its factorization.

51964388278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54930699.

The product of its digits is 23224320, while the sum is 61.

The spelling of 51964388278 in words is "fifty-one billion, nine hundred sixty-four million, three hundred eighty-eight thousand, two hundred seventy-eight".