51667945794 has 40 divisors (see below), whose sum is σ = 115788961728. Its totient is φ = 17220493080.

The previous prime is 51667945783. The next prime is 51667945801. The reversal of 51667945794 is 49754976615.

51667945794 is a `hidden beast` number, since 51 + 6 + 6 + 7 + 9 + 4 + 579 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1775179 + ... + 1804049.

Almost surely, 2^51667945794 is an apocalyptic number.

51667945794 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51667945794 is an abundant number, since it is smaller than the sum of its proper divisors (64121015934).

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

51667945794 is a wasteful number, since it uses less digits than its factorization.

51667945794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39932 (or 39923 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 51667945794 in words is "fifty-one billion, six hundred sixty-seven million, nine hundred forty-five thousand, seven hundred ninety-four".