10656021601 has 4 divisors (see below), whose sum is σ = 11119326912. Its totient is φ = 10192716292.

The previous prime is 10656021577. The next prime is 10656021611. The reversal of 10656021601 is 10612065601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10656021601 - 2⁵ = 10656021569 is a prime.

It is a super-2 number, since 2×10656021601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10656021601.

It is not an unprimeable number, because it can be changed into a prime (10656021611) 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 3 ways as a sum of consecutive naturals, for example, 231652621 + ... + 231652666.

It is an arithmetic number, because the mean of its divisors is an integer number (2779831728).

Almost surely, 2^10656021601 is an apocalyptic number.

It is an amenable number.

10656021601 is a deficient number, since it is larger than the sum of its proper divisors (463305311).

10656021601 is an equidigital number, since it uses as much as digits as its factorization.

10656021601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463305310.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 10656021601 in words is "ten billion, six hundred fifty-six million, twenty-one thousand, six hundred one".