55168690 has 16 divisors (see below), whose sum is σ = 99503640. Its totient is φ = 22023040.

The previous prime is 55168679. The next prime is 55168709. The reversal of 55168690 is 9686155.

It can be written as a sum of positive squares in 4 ways, for example, as 27888961 + 27279729 = 5281^2 + 5223^2 .

It is a super-2 number, since 2×55168690² = 6087168712632200, which contains 22 as substring.

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, 85 + ... + 10504.

Almost surely, 2^55168690 is an apocalyptic number.

55168690 is a deficient number, since it is larger than the sum of its proper divisors (44334950).

55168690 is a wasteful number, since it uses less digits than its factorization.

55168690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55168690 is about 7427.5628573577. The cubic root of 55168690 is about 380.6836492877.

The spelling of 55168690 in words is "fifty-five million, one hundred sixty-eight thousand, six hundred ninety".