56611870061 has 2 divisors, whose sum is σ = 56611870062. Its totient is φ = 56611870060.

The previous prime is 56611870043. The next prime is 56611870127. The reversal of 56611870061 is 16007811665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55834854436 + 777015625 = 236294^2 + 27875^2 .

It is a cyclic number.

It is not a de Polignac number, because 56611870061 - 2¹⁰ = 56611869037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56611872061) 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 as a sum of consecutive naturals, namely, 28305935030 + 28305935031.

It is an arithmetic number, because the mean of its divisors is an integer number (28305935031).

Almost surely, 2^56611870061 is an apocalyptic number.

It is an amenable number.

56611870061 is a deficient number, since it is larger than the sum of its proper divisors (1).

56611870061 is an equidigital number, since it uses as much as digits as its factorization.

56611870061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 56611870061 in words is "fifty-six billion, six hundred eleven million, eight hundred seventy thousand, sixty-one".