51630340608 has 240 divisors, whose sum is σ = 185778305856. Its totient is φ = 13410385920.

The previous prime is 51630340589. The next prime is 51630340639. The reversal of 51630340608 is 80604303615.

51630340608 is a `hidden beast` number, since 5 + 1 + 6 + 3 + 0 + 3 + 40 + 608 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282060 + ... + 427572.

Almost surely, 2^51630340608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51630340608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92889152928).

51630340608 is an abundant number, since it is smaller than the sum of its proper divisors (134147965248).

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

51630340608 is a wasteful number, since it uses less digits than its factorization.

51630340608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145555 (or 145536 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 51630340608 in words is "fifty-one billion, six hundred thirty million, three hundred forty thousand, six hundred eight".