51263881464 has 32 divisors (see below), whose sum is σ = 128366784000. Its totient is φ = 17060349792.

The previous prime is 51263881457. The next prime is 51263881477. The reversal of 51263881464 is 46418836215.

It is a congruent number.

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, 1710504 + ... + 1740215.

It is an arithmetic number, because the mean of its divisors is an integer number (4011462000).

Almost surely, 2^51263881464 is an apocalyptic number.

It is an amenable number.

51263881464 is an abundant number, since it is smaller than the sum of its proper divisors (77102902536).

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

51263881464 is a wasteful number, since it uses less digits than its factorization.

51263881464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451347 (or 3451343 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The spelling of 51263881464 in words is "fifty-one billion, two hundred sixty-three million, eight hundred eighty-one thousand, four hundred sixty-four".