623455556 has 12 divisors (see below), whose sum is σ = 1092205968. Its totient is φ = 311396712.

The previous prime is 623455519. The next prime is 623455559. The reversal of 623455556 is 655554326.

It is not an unprimeable number, because it can be changed into a prime (623455559) 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, 78506 + ... + 86081.

It is an arithmetic number, because the mean of its divisors is an integer number (91017164).

Almost surely, 2^623455556 is an apocalyptic number.

It is an amenable number.

623455556 is a deficient number, since it is larger than the sum of its proper divisors (468750412).

623455556 is a wasteful number, since it uses less digits than its factorization.

623455556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165538 (or 165536 counting only the distinct ones).

The product of its digits is 540000, while the sum is 41.

The square root of 623455556 is about 24969.0920139279. The cubic root of 623455556 is about 854.2831358845.

The spelling of 623455556 in words is "six hundred twenty-three million, four hundred fifty-five thousand, five hundred fifty-six".