51387884994 has 16 divisors (see below), whose sum is σ = 108185021280. Its totient is φ = 16227753120.

The previous prime is 51387884953. The next prime is 51387885007. The reversal of 51387884994 is 49948878315.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225385347 + ... + 225385574.

It is an arithmetic number, because the mean of its divisors is an integer number (6761563830).

Almost surely, 2^51387884994 is an apocalyptic number.

51387884994 is an abundant number, since it is smaller than the sum of its proper divisors (56797136286).

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

51387884994 is a wasteful number, since it uses less digits than its factorization.

51387884994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450770945.

The product of its digits is 69672960, while the sum is 66.

The spelling of 51387884994 in words is "fifty-one billion, three hundred eighty-seven million, eight hundred eighty-four thousand, nine hundred ninety-four".