51987165795 has 96 divisors (see below), whose sum is σ = 95944343040. Its totient is φ = 26705427840.

The previous prime is 51987165787. The next prime is 51987165829. The reversal of 51987165795 is 59756178915.

51987165795 is a `hidden beast` number, since 51 + 9 + 8 + 7 + 1 + 6 + 579 + 5 = 666.

It is not a de Polignac number, because 51987165795 - 2³ = 51987165787 is a prime.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 19034580 + ... + 19037310.

It is an arithmetic number, because the mean of its divisors is an integer number (999420240).

Almost surely, 2^51987165795 is an apocalyptic number.

51987165795 is a deficient number, since it is larger than the sum of its proper divisors (43957177245).

51987165795 is a wasteful number, since it uses less digits than its factorization.

51987165795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922 (or 2879 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 63.

The spelling of 51987165795 in words is "fifty-one billion, nine hundred eighty-seven million, one hundred sixty-five thousand, seven hundred ninety-five".