51685561764344 has 32 divisors (see below), whose sum is σ = 99586798147200. Its totient is φ = 25129884631680.

The previous prime is 51685561764329. The next prime is 51685561764427. The reversal of 51685561764344 is 44346716558615.

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49632104 + ... + 50662775.

It is an arithmetic number, because the mean of its divisors is an integer number (3112087442100).

Almost surely, 2^{51685561764344} is an apocalyptic number.

It is an amenable number.

51685561764344 is a deficient number, since it is larger than the sum of its proper divisors (47901236382856).

51685561764344 is a wasteful number, since it uses less digits than its factorization.

51685561764344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100296663 (or 100296659 counting only the distinct ones).

The product of its digits is 290304000, while the sum is 65.

The spelling of 51685561764344 in words is "fifty-one trillion, six hundred eighty-five billion, five hundred sixty-one million, seven hundred sixty-four thousand, three hundred forty-four".