51630407460 has 36 divisors (see below), whose sum is σ = 156612236508. Its totient is φ = 13768108608.

The previous prime is 51630407449. The next prime is 51630407497. The reversal of 51630407460 is 6470403615.

It is a happy number.

51630407460 is a `hidden beast` number, since 516 + 30 + 40 + 74 + 6 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25756398144 + 25874009316 = 160488^2 + 160854^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143417619 + ... + 143417978.

It is an arithmetic number, because the mean of its divisors is an integer number (4350339903).

Almost surely, 2^51630407460 is an apocalyptic number.

It is an amenable number.

51630407460 is an abundant number, since it is smaller than the sum of its proper divisors (104981829048).

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

51630407460 is a wasteful number, since it uses less digits than its factorization.

51630407460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286835612 (or 286835607 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 51630407460 in words is "fifty-one billion, six hundred thirty million, four hundred seven thousand, four hundred sixty".