56557063621 has 8 divisors (see below), whose sum is σ = 59538078080. Its totient is φ = 53576481888.

The previous prime is 56557063603. The next prime is 56557063663. The reversal of 56557063621 is 12636075565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56557063621 - 2¹¹ = 56557061573 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 (56557073621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179785 + ... + 381361.

It is an arithmetic number, because the mean of its divisors is an integer number (7442259760).

Almost surely, 2^56557063621 is an apocalyptic number.

It is an amenable number.

56557063621 is a deficient number, since it is larger than the sum of its proper divisors (2981014459).

56557063621 is a wasteful number, since it uses less digits than its factorization.

56557063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216363.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 56557063621 in words is "fifty-six billion, five hundred fifty-seven million, sixty-three thousand, six hundred twenty-one".