56221047617 has 4 divisors (see below), whose sum is σ = 64252625856. Its totient is φ = 48189469380.

The previous prime is 56221047607. The next prime is 56221047643. The reversal of 56221047617 is 71674012265.

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 56221047617 - 2¹⁰ = 56221046593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56221047607) 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, 4015789109 + ... + 4015789122.

It is an arithmetic number, because the mean of its divisors is an integer number (16063156464).

Almost surely, 2^56221047617 is an apocalyptic number.

It is an amenable number.

56221047617 is a deficient number, since it is larger than the sum of its proper divisors (8031578239).

56221047617 is an equidigital number, since it uses as much as digits as its factorization.

56221047617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031578238.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 56221047617 in words is "fifty-six billion, two hundred twenty-one million, forty-seven thousand, six hundred seventeen".