51279667584 has 64 divisors (see below), whose sum is σ = 137417145840. Its totient is φ = 16941940736.

The previous prime is 51279667567. The next prime is 51279667609. The reversal of 51279667584 is 48576697215.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547497 + ... + 634280.

Almost surely, 2^51279667584 is an apocalyptic number.

It is an amenable number.

51279667584 is an abundant number, since it is smaller than the sum of its proper divisors (86137478256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51279667584 is a wasteful number, since it uses less digits than its factorization.

51279667584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181907 (or 1181895 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 51279667584 in words is "fifty-one billion, two hundred seventy-nine million, six hundred sixty-seven thousand, five hundred eighty-four".