56661645101 has 8 divisors (see below), whose sum is σ = 59127943680. Its totient is φ = 54195575632.

The previous prime is 56661645071. The next prime is 56661645113. The reversal of 56661645101 is 10154616665.

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-56661645101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661645191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617255 + ... + 703083.

It is an arithmetic number, because the mean of its divisors is an integer number (7390992960).

Almost surely, 2^56661645101 is an apocalyptic number.

It is an amenable number.

56661645101 is a deficient number, since it is larger than the sum of its proper divisors (2466298579).

56661645101 is a wasteful number, since it uses less digits than its factorization.

56661645101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114555.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 56661645101 in words is "fifty-six billion, six hundred sixty-one million, six hundred forty-five thousand, one hundred one".