10646886561 has 4 divisors (see below), whose sum is σ = 14195848752. Its totient is φ = 7097924372.

The previous prime is 10646886557. The next prime is 10646886577. The reversal of 10646886561 is 16568864601.

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 10646886561 - 2² = 10646886557 is a prime.

It is a super-2 number, since 2×10646886561² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10646886521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1774481091 + ... + 1774481096.

It is an arithmetic number, because the mean of its divisors is an integer number (3548962188).

Almost surely, 2^10646886561 is an apocalyptic number.

It is an amenable number.

10646886561 is a deficient number, since it is larger than the sum of its proper divisors (3548962191).

10646886561 is an equidigital number, since it uses as much as digits as its factorization.

10646886561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548962190.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 10646886561 in words is "ten billion, six hundred forty-six million, eight hundred eighty-six thousand, five hundred sixty-one".