656555100001 has 8 divisors (see below), whose sum is σ = 692529759680. Its totient is φ = 620722353168.

The previous prime is 656555099987. The next prime is 656555100031. The reversal of 656555100001 is 100001555656.

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 656555100001 - 2¹⁹ = 656554575713 is a prime.

It is a super-2 number, since 2×656555100001² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656555100001.

It is not an unprimeable number, because it can be changed into a prime (656555100031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35468706 + ... + 35487211.

It is an arithmetic number, because the mean of its divisors is an integer number (86566219960).

Almost surely, 2^656555100001 is an apocalyptic number.

It is an amenable number.

656555100001 is a deficient number, since it is larger than the sum of its proper divisors (35974659679).

656555100001 is a wasteful number, since it uses less digits than its factorization.

656555100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70956423.

The product of its (nonzero) digits is 22500, while the sum is 34.

Adding to 656555100001 its reverse (100001555656), we get a palindrome (756556655657).

The spelling of 656555100001 in words is "six hundred fifty-six billion, five hundred fifty-five million, one hundred thousand, one".