555138568 has 24 divisors (see below), whose sum is σ = 1053773550. Its totient is φ = 274139712.

The previous prime is 555138541. The next prime is 555138601. The reversal of 555138568 is 865831555.

It can be written as a sum of positive squares in only one way, i.e., 527069764 + 28068804 = 22958^2 + 5298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628255 + ... + 629137.

Almost surely, 2^555138568 is an apocalyptic number.

It is an amenable number.

555138568 is a deficient number, since it is larger than the sum of its proper divisors (498634982).

555138568 is an frugal number, since it uses more digits than its factorization.

555138568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861 (or 974 counting only the distinct ones).

The product of its digits is 720000, while the sum is 46.

The square root of 555138568 is about 23561.3787372471. The cubic root of 555138568 is about 821.8649640146.

The spelling of 555138568 in words is "five hundred fifty-five million, one hundred thirty-eight thousand, five hundred sixty-eight".