51700023661 has 8 divisors (see below), whose sum is σ = 60738489504. Its totient is φ = 43384635120.

The previous prime is 51700023659. The next prime is 51700023703. The reversal of 51700023661 is 16632000715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51700023661 - 2¹ = 51700023659 is a prime.

51700023661 is a modest number, since divided by 23661 gives 5170 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51700023601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 180769171 + ... + 180769456.

It is an arithmetic number, because the mean of its divisors is an integer number (7592311188).

Almost surely, 2^51700023661 is an apocalyptic number.

It is an amenable number.

51700023661 is a deficient number, since it is larger than the sum of its proper divisors (9038465843).

51700023661 is a wasteful number, since it uses less digits than its factorization.

51700023661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361538651.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 51700023661 in words is "fifty-one billion, seven hundred million, twenty-three thousand, six hundred sixty-one".