51668352278 has 16 divisors (see below), whose sum is σ = 81660646320. Its totient is φ = 24450771456.

The previous prime is 51668352247. The next prime is 51668352287. The reversal of 51668352278 is 87225386615.

51668352278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 618875 + ... + 697382.

It is an arithmetic number, because the mean of its divisors is an integer number (5103790395).

Almost surely, 2^51668352278 is an apocalyptic number.

51668352278 is a deficient number, since it is larger than the sum of its proper divisors (29992294042).

51668352278 is a wasteful number, since it uses less digits than its factorization.

51668352278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317311.

The product of its digits is 4838400, while the sum is 53.

The spelling of 51668352278 in words is "fifty-one billion, six hundred sixty-eight million, three hundred fifty-two thousand, two hundred seventy-eight".