56765659099566 has 16 divisors (see below), whose sum is σ = 115130350850688. Its totient is φ = 18655380924600.

The previous prime is 56765659099481. The next prime is 56765659099571. The reversal of 56765659099566 is 66599095656765.

It is a Curzon number.

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, 66626360020 + ... + 66626360871.

It is an arithmetic number, because the mean of its divisors is an integer number (7195646928168).

Almost surely, 2^{56765659099566} is an apocalyptic number.

56765659099566 is an abundant number, since it is smaller than the sum of its proper divisors (58364691751122).

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

56765659099566 is a wasteful number, since it uses less digits than its factorization.

56765659099566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133252720967.

The product of its (nonzero) digits is 24800580000, while the sum is 84.

The spelling of 56765659099566 in words is "fifty-six trillion, seven hundred sixty-five billion, six hundred fifty-nine million, ninety-nine thousand, five hundred sixty-six".