51196000078 has 16 divisors (see below), whose sum is σ = 77076473040. Its totient is φ = 25504004736.

The previous prime is 51196000069. The next prime is 51196000109. The reversal of 51196000078 is 87000069115.

51196000078 is a nontrivial binomial coefficient, being equal to C(319988, 2).

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, 599976 + ... + 679972.

It is an arithmetic number, because the mean of its divisors is an integer number (4817279565).

Almost surely, 2^51196000078 is an apocalyptic number.

51196000078 is the 319987-th triangular number and also the 159994-th hexagonal number.

51196000078 is the 106663-rd centered nonagonal number.

51196000078 is a deficient number, since it is larger than the sum of its proper divisors (25880472962).

51196000078 is a wasteful number, since it uses less digits than its factorization.

51196000078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81171.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 51196000078 in words is "fifty-one billion, one hundred ninety-six million, seventy-eight", and thus it is an aban number.