51002564144 has 60 divisors (see below), whose sum is σ = 121712783544. Its totient is φ = 20572457472.

The previous prime is 51002564141. The next prime is 51002564153. The reversal of 51002564144 is 44146520015.

It is a self number, because there is not a number n which added to its sum of digits gives 51002564144.

It is not an unprimeable number, because it can be changed into a prime (51002564141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1900034 + ... + 1926689.

Almost surely, 2^51002564144 is an apocalyptic number.

It is an amenable number.

51002564144 is an abundant number, since it is smaller than the sum of its proper divisors (70710219400).

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

51002564144 is a wasteful number, since it uses less digits than its factorization.

51002564144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826762 (or 3826749 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 51002564144 in words is "fifty-one billion, two million, five hundred sixty-four thousand, one hundred forty-four".