56009640961 has 2 divisors, whose sum is σ = 56009640962. Its totient is φ = 56009640960.

The previous prime is 56009640959. The next prime is 56009640977. The reversal of 56009640961 is 16904690065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33951747600 + 22057893361 = 184260^2 + 148519^2 .

It is a cyclic number.

It is not a de Polignac number, because 56009640961 - 2¹ = 56009640959 is a prime.

It is a super-3 number, since 3×56009640961³ (a number of 33 digits) contains 333 as substring.

Together with 56009640959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56009640901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28004820480 + 28004820481.

It is an arithmetic number, because the mean of its divisors is an integer number (28004820481).

Almost surely, 2^56009640961 is an apocalyptic number.

It is an amenable number.

56009640961 is a deficient number, since it is larger than the sum of its proper divisors (1).

56009640961 is an equidigital number, since it uses as much as digits as its factorization.

56009640961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 56009640961 in words is "fifty-six billion, nine million, six hundred forty thousand, nine hundred sixty-one".