51667420428 has 60 divisors (see below), whose sum is σ = 145458765760. Its totient is φ = 15897666528.

The previous prime is 51667420393. The next prime is 51667420433. The reversal of 51667420428 is 82402476615.

51667420428 is a `hidden beast` number, since 516 + 6 + 74 + 20 + 42 + 8 = 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, 6129148 + ... + 6137571.

Almost surely, 2^51667420428 is an apocalyptic number.

It is an amenable number.

51667420428 is an abundant number, since it is smaller than the sum of its proper divisors (93791345332).

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

51667420428 is a wasteful number, since it uses less digits than its factorization.

51667420428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12266748 (or 12266737 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 51667420428 in words is "fifty-one billion, six hundred sixty-seven million, four hundred twenty thousand, four hundred twenty-eight".