56294009821 has 4 divisors (see below), whose sum is σ = 64336011232. Its totient is φ = 48252008412.

The previous prime is 56294009809. The next prime is 56294009861. The reversal of 56294009821 is 12890049265.

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 not a de Polignac number, because 56294009821 - 2⁷ = 56294009693 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 (56294009861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4021000695 + ... + 4021000708.

It is an arithmetic number, because the mean of its divisors is an integer number (16084002808).

Almost surely, 2^56294009821 is an apocalyptic number.

It is an amenable number.

56294009821 is a deficient number, since it is larger than the sum of its proper divisors (8042001411).

56294009821 is an equidigital number, since it uses as much as digits as its factorization.

56294009821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8042001410.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 56294009821 in words is "fifty-six billion, two hundred ninety-four million, nine thousand, eight hundred twenty-one".