555681404 has 24 divisors (see below), whose sum is σ = 981384768. Its totient is φ = 275296320.

The previous prime is 555681377. The next prime is 555681419. The reversal of 555681404 is 404186555.

It is a happy number.

It is a super-2 number, since 2×555681404² = 617563645502822432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269642 + ... + 271694.

It is an arithmetic number, because the mean of its divisors is an integer number (40891032).

Almost surely, 2^555681404 is an apocalyptic number.

It is an amenable number.

555681404 is a deficient number, since it is larger than the sum of its proper divisors (425703364).

555681404 is a wasteful number, since it uses less digits than its factorization.

555681404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 555681404 is about 23572.8955370358. The cubic root of 555681404 is about 822.1327605476.

The spelling of 555681404 in words is "five hundred fifty-five million, six hundred eighty-one thousand, four hundred four".