51296618816 has 56 divisors (see below), whose sum is σ = 103543181280. Its totient is φ = 25210153472.

The previous prime is 51296618801. The next prime is 51296618843. The reversal of 51296618816 is 61881669215.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1021955 + ... + 1070973.

It is an arithmetic number, because the mean of its divisors is an integer number (1848985380).

Almost surely, 2^51296618816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51296618816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51771590640).

51296618816 is an abundant number, since it is smaller than the sum of its proper divisors (52246562464).

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

51296618816 is a wasteful number, since it uses less digits than its factorization.

51296618816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49311 (or 49301 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 53.

The spelling of 51296618816 in words is "fifty-one billion, two hundred ninety-six million, six hundred eighteen thousand, eight hundred sixteen".