55365891 has 8 divisors (see below), whose sum is σ = 84367104. Its totient is φ = 31637640.

The previous prime is 55365883. The next prime is 55365913. The reversal of 55365891 is 19856355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55365891 - 2³ = 55365883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55365851) by changing a digit.

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, 1318215 + ... + 1318256.

It is an arithmetic number, because the mean of its divisors is an integer number (10545888).

Almost surely, 2^55365891 is an apocalyptic number.

55365891 is a deficient number, since it is larger than the sum of its proper divisors (29001213).

55365891 is a wasteful number, since it uses less digits than its factorization.

55365891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636481.

The product of its digits is 162000, while the sum is 42.

The square root of 55365891 is about 7440.8259622168. The cubic root of 55365891 is about 381.1366956682.

The spelling of 55365891 in words is "fifty-five million, three hundred sixty-five thousand, eight hundred ninety-one".