56630442821 has 4 divisors (see below), whose sum is σ = 56638174944. Its totient is φ = 56622710700.

The previous prime is 56630442811. The next prime is 56630442851. The reversal of 56630442821 is 12824403665.

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-56630442821 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 (56630442811) 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, 3855065 + ... + 3869726.

It is an arithmetic number, because the mean of its divisors is an integer number (14159543736).

Almost surely, 2^56630442821 is an apocalyptic number.

It is an amenable number.

56630442821 is a deficient number, since it is larger than the sum of its proper divisors (7732123).

56630442821 is an equidigital number, since it uses as much as digits as its factorization.

56630442821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732122.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 56630442821 in words is "fifty-six billion, six hundred thirty million, four hundred forty-two thousand, eight hundred twenty-one".