56200415621 has 4 divisors (see below), whose sum is σ = 64229046432. Its totient is φ = 48171784812.

The previous prime is 56200415503. The next prime is 56200415639. The reversal of 56200415621 is 12651400265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56200415621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56200315621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4014315395 + ... + 4014315408.

It is an arithmetic number, because the mean of its divisors is an integer number (16057261608).

Almost surely, 2^56200415621 is an apocalyptic number.

It is an amenable number.

56200415621 is a deficient number, since it is larger than the sum of its proper divisors (8028630811).

56200415621 is an equidigital number, since it uses as much as digits as its factorization.

56200415621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028630810.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 56200415621 its reverse (12651400265), we get a palindrome (68851815886).

The spelling of 56200415621 in words is "fifty-six billion, two hundred million, four hundred fifteen thousand, six hundred twenty-one".