56564105352021 has 12 divisors (see below), whose sum is σ = 84521076963180. Its totient is φ = 36409079306880.

The previous prime is 56564105352011. The next prime is 56564105352023. The reversal of 56564105352021 is 12025350146565.

56564105352021 is a `hidden beast` number, since 5 + 6 + 5 + 64 + 10 + 53 + 520 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38365016602500 + 18199088749521 = 6193950^2 + 4266039^2 .

It is not a de Polignac number, because 56564105352021 - 2⁵ = 56564105351989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56564105352023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108360354820 + ... + 108360355341.

It is an arithmetic number, because the mean of its divisors is an integer number (7043423080265).

Almost surely, 2^{56564105352021} is an apocalyptic number.

It is an amenable number.

56564105352021 is a deficient number, since it is larger than the sum of its proper divisors (27956971611159).

56564105352021 is a wasteful number, since it uses less digits than its factorization.

56564105352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216720710196 (or 216720710193 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

Adding to 56564105352021 its reverse (12025350146565), we get a palindrome (68589455498586).

The spelling of 56564105352021 in words is "fifty-six trillion, five hundred sixty-four billion, one hundred five million, three hundred fifty-two thousand, twenty-one".