51737536661 has 16 divisors (see below), whose sum is σ = 54333664704. Its totient is φ = 49218658944.

The previous prime is 51737536657. The next prime is 51737536717. The reversal of 51737536661 is 16663573715.

It is a cyclic number.

It is not a de Polignac number, because 51737536661 - 2² = 51737536657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51734536661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229370 + ... + 395076.

It is an arithmetic number, because the mean of its divisors is an integer number (3395854044).

Almost surely, 2^51737536661 is an apocalyptic number.

It is an amenable number.

51737536661 is a deficient number, since it is larger than the sum of its proper divisors (2596128043).

51737536661 is a wasteful number, since it uses less digits than its factorization.

51737536661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165940.

The product of its digits is 2381400, while the sum is 50.

The spelling of 51737536661 in words is "fifty-one billion, seven hundred thirty-seven million, five hundred thirty-six thousand, six hundred sixty-one".