56012222221661 has 4 divisors (see below), whose sum is σ = 56016828123324. Its totient is φ = 56007616320000.

The previous prime is 56012222221649. The next prime is 56012222221667. The reversal of 56012222221661 is 16612222221065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28556519068900 + 27455703152761 = 5343830^2 + 5239819^2 .

It is a cyclic number.

It is not a de Polignac number, because 56012222221661 - 2³⁴ = 55995042352477 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 (56012222221667) 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, 2302932590 + ... + 2302956911.

It is an arithmetic number, because the mean of its divisors is an integer number (14004207030831).

Almost surely, 2^{56012222221661} is an apocalyptic number.

It is an amenable number.

56012222221661 is a deficient number, since it is larger than the sum of its proper divisors (4605901663).

56012222221661 is a wasteful number, since it uses less digits than its factorization.

56012222221661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605901662.

The product of its (nonzero) digits is 69120, while the sum is 38.

It can be divided in two parts, 560 and 12222221661, that added together give a palindrome (12222222221).

The spelling of 56012222221661 in words is "fifty-six trillion, twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, six hundred sixty-one".