55000556 has 12 divisors (see below), whose sum is σ = 103654992. Its totient is φ = 25384848.

The previous prime is 55000553. The next prime is 55000571. The reversal of 55000556 is 65500055.

It is a super-4 number, since 4×55000556⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (55000553) 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, 528800 + ... + 528903.

It is an arithmetic number, because the mean of its divisors is an integer number (8637916).

Almost surely, 2^55000556 is an apocalyptic number.

It is an amenable number.

55000556 is a deficient number, since it is larger than the sum of its proper divisors (48654436).

55000556 is a wasteful number, since it uses less digits than its factorization.

55000556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057720 (or 1057718 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 55000556 is about 7416.2359725133. The cubic root of 55000556 is about 380.2965275516.

The spelling of 55000556 in words is "fifty-five million, five hundred fifty-six", and thus it is an aban number.