51636216624 has 20 divisors (see below), whose sum is σ = 133393559736. Its totient is φ = 17212072192.

The previous prime is 51636216623. The next prime is 51636216637. The reversal of 51636216624 is 42661263615.

It is not an unprimeable number, because it can be changed into a prime (51636216623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537877209 + ... + 537877304.

Almost surely, 2^51636216624 is an apocalyptic number.

It is an amenable number.

51636216624 is an abundant number, since it is smaller than the sum of its proper divisors (81757343112).

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

51636216624 is a wasteful number, since it uses less digits than its factorization.

51636216624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075754524 (or 1075754518 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The spelling of 51636216624 in words is "fifty-one billion, six hundred thirty-six million, two hundred sixteen thousand, six hundred twenty-four".