55550690 has 32 divisors (see below), whose sum is σ = 110602800. Its totient is φ = 19954944.

The previous prime is 55550641. The next prime is 55550701. The reversal of 55550690 is 9605555.

It can be written as a sum of positive squares in 8 ways, for example, as 41615401 + 13935289 = 6451^2 + 3733^2 .

It is a super-2 number, since 2×55550690² = 6171758318952200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55550690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965 + ... + 10584.

Almost surely, 2^55550690 is an apocalyptic number.

55550690 is a deficient number, since it is larger than the sum of its proper divisors (55052110).

55550690 is a wasteful number, since it uses less digits than its factorization.

55550690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11606.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 55550690 is about 7453.2335264635. The cubic root of 55550690 is about 381.5602745177.

The spelling of 55550690 in words is "fifty-five million, five hundred fifty thousand, six hundred ninety".