51656758447879 has 24 divisors (see below), whose sum is σ = 58369717683360. Its totient is φ = 45608651966592.

The previous prime is 51656758447871. The next prime is 51656758447907. The reversal of 51656758447879 is 97874485765615.

It is a happy number.

It is not a de Polignac number, because 51656758447879 - 2³ = 51656758447871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656758447871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147799657 + ... + 148148749.

It is an arithmetic number, because the mean of its divisors is an integer number (2432071570140).

Almost surely, 2^{51656758447879} is an apocalyptic number.

51656758447879 is a deficient number, since it is larger than the sum of its proper divisors (6712959235481).

51656758447879 is a wasteful number, since it uses less digits than its factorization.

51656758447879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387211 (or 387198 counting only the distinct ones).

The product of its digits is 14224896000, while the sum is 82.

The spelling of 51656758447879 in words is "fifty-one trillion, six hundred fifty-six billion, seven hundred fifty-eight million, four hundred forty-seven thousand, eight hundred seventy-nine".