56661098657 has 8 divisors (see below), whose sum is σ = 56889400416. Its totient is φ = 56432858112.

The previous prime is 56661098639. The next prime is 56661098693. The reversal of 56661098657 is 75689016665.

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-56661098657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56661098596 and 56661098605.

It is not an unprimeable number, because it can be changed into a prime (56661098357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3085898 + ... + 3104204.

It is an arithmetic number, because the mean of its divisors is an integer number (7111175052).

Almost surely, 2^56661098657 is an apocalyptic number.

It is an amenable number.

56661098657 is a deficient number, since it is larger than the sum of its proper divisors (228301759).

56661098657 is a wasteful number, since it uses less digits than its factorization.

56661098657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30607.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 56661098657 in words is "fifty-six billion, six hundred sixty-one million, ninety-eight thousand, six hundred fifty-seven".