56516065561656 has 48 divisors (see below), whose sum is σ = 154418895970560. Its totient is φ = 18671974460160.

The previous prime is 56516065561649. The next prime is 56516065561673. The reversal of 56516065561656 is 65616556061565.

56516065561656 is a `hidden beast` number, since 5 + 6 + 5 + 1 + 6 + 0 + 6 + 5 + 5 + 616 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 56516065561593 and 56516065561602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473201400 + ... + 3473217671.

It is an arithmetic number, because the mean of its divisors is an integer number (3217060332720).

Almost surely, 2^{56516065561656} is an apocalyptic number.

It is an amenable number.

56516065561656 is an abundant number, since it is smaller than the sum of its proper divisors (97902830408904).

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

56516065561656 is a wasteful number, since it uses less digits than its factorization.

56516065561656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946419196 (or 6946419189 counting only the distinct ones).

The product of its (nonzero) digits is 145800000, while the sum is 63.

The spelling of 56516065561656 in words is "fifty-six trillion, five hundred sixteen billion, sixty-five million, five hundred sixty-one thousand, six hundred fifty-six".