51916879642 has 16 divisors (see below), whose sum is σ = 80646461280. Its totient is φ = 25049272752.

The previous prime is 51916879627. The next prime is 51916879661. The reversal of 51916879642 is 24697861915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3629517 + ... + 3643792.

It is an arithmetic number, because the mean of its divisors is an integer number (5040403830).

Almost surely, 2^51916879642 is an apocalyptic number.

51916879642 is a deficient number, since it is larger than the sum of its proper divisors (28729581638).

51916879642 is a wasteful number, since it uses less digits than its factorization.

51916879642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7273437.

The product of its digits is 6531840, while the sum is 58.

The spelling of 51916879642 in words is "fifty-one billion, nine hundred sixteen million, eight hundred seventy-nine thousand, six hundred forty-two".