51636140652 has 24 divisors (see below), whose sum is σ = 120535210432. Its totient is φ = 17204778000.

The previous prime is 51636140651. The next prime is 51636140671. The reversal of 51636140652 is 25604163615.

It is a self number, because there is not a number n which added to its sum of digits gives 51636140652.

It is not an unprimeable number, because it can be changed into a prime (51636140651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878974 + ... + 935877.

Almost surely, 2^51636140652 is an apocalyptic number.

It is an amenable number.

51636140652 is an abundant number, since it is smaller than the sum of its proper divisors (68899069780).

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

51636140652 is a wasteful number, since it uses less digits than its factorization.

51636140652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817229 (or 1817227 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 51636140652 in words is "fifty-one billion, six hundred thirty-six million, one hundred forty thousand, six hundred fifty-two".