51656661551562 has 16 divisors (see below), whose sum is σ = 103368364853472. Its totient is φ = 17209713558800.

The previous prime is 51656661551437. The next prime is 51656661551587. The reversal of 51656661551562 is 26515516665615.

It is a junction number, because it is equal to n+sod(n) for n = 51656661551496 and 51656661551505.

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, 2293394064 + ... + 2293416587.

It is an arithmetic number, because the mean of its divisors is an integer number (6460522803342).

Almost surely, 2^{51656661551562} is an apocalyptic number.

51656661551562 is an abundant number, since it is smaller than the sum of its proper divisors (51711703301910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51656661551562 is a wasteful number, since it uses less digits than its factorization.

51656661551562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586812533.

The product of its digits is 48600000, while the sum is 60.

The spelling of 51656661551562 in words is "fifty-one trillion, six hundred fifty-six billion, six hundred sixty-one million, five hundred fifty-one thousand, five hundred sixty-two".