55698891 has 16 divisors (see below), whose sum is σ = 76243200. Its totient is φ = 36155808.

The previous prime is 55698887. The next prime is 55698911. The reversal of 55698891 is 19889655.

It is not a de Polignac number, because 55698891 - 2² = 55698887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55698791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17850 + ... + 20736.

It is an arithmetic number, because the mean of its divisors is an integer number (4765200).

Almost surely, 2^55698891 is an apocalyptic number.

55698891 is a deficient number, since it is larger than the sum of its proper divisors (20544309).

55698891 is a wasteful number, since it uses less digits than its factorization.

55698891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058.

The product of its digits is 777600, while the sum is 51.

The square root of 55698891 is about 7463.1689649907. The cubic root of 55698891 is about 381.8992886192.

The spelling of 55698891 in words is "fifty-five million, six hundred ninety-eight thousand, eight hundred ninety-one".