10561818556 has 6 divisors (see below), whose sum is σ = 18483182480. Its totient is φ = 5280909276.

The previous prime is 10561818551. The next prime is 10561818613. The reversal of 10561818556 is 65581816501.

It is a super-2 number, since 2×10561818556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10561818551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320227316 + ... + 1320227323.

Almost surely, 2^10561818556 is an apocalyptic number.

It is an amenable number.

10561818556 is a deficient number, since it is larger than the sum of its proper divisors (7921363924).

10561818556 is a wasteful number, since it uses less digits than its factorization.

10561818556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640454643 (or 2640454641 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 46.

The spelling of 10561818556 in words is "ten billion, five hundred sixty-one million, eight hundred eighteen thousand, five hundred fifty-six".