51408515056 has 20 divisors (see below), whose sum is σ = 99607513104. Its totient is φ = 25703350400.

The previous prime is 51408515029. The next prime is 51408515101. The reversal of 51408515056 is 65051580415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859236 + ... + 917116.

Almost surely, 2^51408515056 is an apocalyptic number.

It is an amenable number.

51408515056 is a deficient number, since it is larger than the sum of its proper divisors (48198998048).

51408515056 is a wasteful number, since it uses less digits than its factorization.

51408515056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113400 (or 113394 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 40.

The spelling of 51408515056 in words is "fifty-one billion, four hundred eight million, five hundred fifteen thousand, fifty-six".