553661556 has 48 divisors (see below), whose sum is σ = 1477840896. Its totient is φ = 158037984.

The previous prime is 553661527. The next prime is 553661561. The reversal of 553661556 is 655166355.

It is a super-2 number, since 2×553661556² = 613082237184682272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108985 + ... + 113951.

It is an arithmetic number, because the mean of its divisors is an integer number (30788352).

Almost surely, 2^553661556 is an apocalyptic number.

It is an amenable number.

553661556 is an abundant number, since it is smaller than the sum of its proper divisors (924179340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

553661556 is a wasteful number, since it uses less digits than its factorization.

553661556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308 (or 6306 counting only the distinct ones).

The product of its digits is 405000, while the sum is 42.

The square root of 553661556 is about 23530.0139396474. The cubic root of 553661556 is about 821.1354268880.

The spelling of 553661556 in words is "five hundred fifty-three million, six hundred sixty-one thousand, five hundred fifty-six".