56661105224645 has 64 divisors (see below), whose sum is σ = 75875080679424. Its totient is φ = 40399321543680.

The previous prime is 56661105224641. The next prime is 56661105224671. The reversal of 56661105224645 is 54642250116665.

It is not a de Polignac number, because 56661105224645 - 2² = 56661105224641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661105224641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 702924914 + ... + 703005516.

It is an arithmetic number, because the mean of its divisors is an integer number (1185548135616).

Almost surely, 2^{56661105224645} is an apocalyptic number.

It is an amenable number.

56661105224645 is a deficient number, since it is larger than the sum of its proper divisors (19213975454779).

56661105224645 is a wasteful number, since it uses less digits than its factorization.

56661105224645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84242.

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 56661105224645 in words is "fifty-six trillion, six hundred sixty-one billion, one hundred five million, two hundred twenty-four thousand, six hundred forty-five".