56361061561 has 8 divisors (see below), whose sum is σ = 65227992320. Its totient is φ = 47697968448.

The previous prime is 56361061543. The next prime is 56361061633. The reversal of 56361061561 is 16516016365.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56361061561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56361061501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50958816 + ... + 50959921.

It is an arithmetic number, because the mean of its divisors is an integer number (8153499040).

Almost surely, 2^56361061561 is an apocalyptic number.

It is an amenable number.

56361061561 is a deficient number, since it is larger than the sum of its proper divisors (8866930759).

56361061561 is a wasteful number, since it uses less digits than its factorization.

56361061561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101918823.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 56361061561 in words is "fifty-six billion, three hundred sixty-one million, sixty-one thousand, five hundred sixty-one".