55689994 has 16 divisors (see below), whose sum is σ = 88792200. Its totient is φ = 26105344.

The previous prime is 55689989. The next prime is 55690027. The reversal of 55689994 is 49998655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35105625 + 20584369 = 5925^2 + 4537^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6102 + ... + 12190.

Almost surely, 2^55689994 is an apocalyptic number.

55689994 is a deficient number, since it is larger than the sum of its proper divisors (33102206).

55689994 is a wasteful number, since it uses less digits than its factorization.

55689994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377.

The product of its digits is 3499200, while the sum is 55.

The square root of 55689994 is about 7462.5728807161. The cubic root of 55689994 is about 381.8789534513.

The spelling of 55689994 in words is "fifty-five million, six hundred eighty-nine thousand, nine hundred ninety-four".