51607160661 has 32 divisors (see below), whose sum is σ = 85201763328. Its totient is φ = 27109635840.

The previous prime is 51607160659. The next prime is 51607160723. The reversal of 51607160661 is 16606170615.

It is not a de Polignac number, because 51607160661 - 2¹ = 51607160659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51607160641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1665555 + ... + 1696256.

It is an arithmetic number, because the mean of its divisors is an integer number (2662555104).

Almost surely, 2^51607160661 is an apocalyptic number.

51607160661 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51607160661 is a deficient number, since it is larger than the sum of its proper divisors (33594602667).

51607160661 is a wasteful number, since it uses less digits than its factorization.

51607160661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361881.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 51607160661 in words is "fifty-one billion, six hundred seven million, one hundred sixty thousand, six hundred sixty-one".