55068891 has 4 divisors (see below), whose sum is σ = 73425192. Its totient is φ = 36712592.

The previous prime is 55068857. The next prime is 55068901. The reversal of 55068891 is 19886055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55068891 - 2⁹ = 55068379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55068991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9178146 + ... + 9178151.

It is an arithmetic number, because the mean of its divisors is an integer number (18356298).

Almost surely, 2^55068891 is an apocalyptic number.

55068891 is a deficient number, since it is larger than the sum of its proper divisors (18356301).

55068891 is a wasteful number, since it uses less digits than its factorization.

55068891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18356300.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 55068891 is about 7420.8416638546. The cubic root of 55068891 is about 380.4539611598.

The spelling of 55068891 in words is "fifty-five million, sixty-eight thousand, eight hundred ninety-one".