56605611557 has 8 divisors (see below), whose sum is σ = 62009953920. Its totient is φ = 51244332160.

The previous prime is 56605611551. The next prime is 56605611563. The reversal of 56605611557 is 75511650665.

It is an interprime number because it is at equal distance from previous prime (56605611551) and next prime (56605611563).

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

It is a cyclic number.

It is not a de Polignac number, because 56605611557 - 2⁶ = 56605611493 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 (56605611551) 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, 10762988 + ... + 10768245.

It is an arithmetic number, because the mean of its divisors is an integer number (7751244240).

Almost surely, 2^56605611557 is an apocalyptic number.

It is an amenable number.

56605611557 is a deficient number, since it is larger than the sum of its proper divisors (5404342363).

56605611557 is a wasteful number, since it uses less digits than its factorization.

56605611557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21531483.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 56605611557 in words is "fifty-six billion, six hundred five million, six hundred eleven thousand, five hundred fifty-seven".