10556661601 has 16 divisors (see below), whose sum is σ = 11380359168. Its totient is φ = 9763894800.

The previous prime is 10556661569. The next prime is 10556661617. The reversal of 10556661601 is 10616665501.

It is a cyclic number.

It is not a de Polignac number, because 10556661601 - 2⁵ = 10556661569 is a prime.

It is a super-2 number, since 2×10556661601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10556661301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969256 + ... + 980086.

It is an arithmetic number, because the mean of its divisors is an integer number (711272448).

Almost surely, 2^10556661601 is an apocalyptic number.

It is an amenable number.

10556661601 is a deficient number, since it is larger than the sum of its proper divisors (823697567).

10556661601 is a wasteful number, since it uses less digits than its factorization.

10556661601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12252.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 10556661601 in words is "ten billion, five hundred fifty-six million, six hundred sixty-one thousand, six hundred one".