51851658852 has 72 divisors (see below), whose sum is σ = 152029457216. Its totient is φ = 14593639104.

The previous prime is 51851658847. The next prime is 51851658853. The reversal of 51851658852 is 25885615815.

51851658852 is a `hidden beast` number, since 5 + 1 + 8 + 5 + 1 + 6 + 588 + 52 = 666.

It is not an unprimeable number, because it can be changed into a prime (51851658853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1518643 + ... + 1552410.

Almost surely, 2^51851658852 is an apocalyptic number.

It is an amenable number.

51851658852 is an abundant number, since it is smaller than the sum of its proper divisors (100177798364).

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

51851658852 is a wasteful number, since it uses less digits than its factorization.

51851658852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071137 (or 3071132 counting only the distinct ones).

The product of its digits is 3840000, while the sum is 54.

The spelling of 51851658852 in words is "fifty-one billion, eight hundred fifty-one million, six hundred fifty-eight thousand, eight hundred fifty-two".