55840845 has 16 divisors (see below), whose sum is σ = 90861120. Its totient is φ = 29276544.

The previous prime is 55840843. The next prime is 55840859. The reversal of 55840845 is 54804855.

It is not a de Polignac number, because 55840845 - 2¹ = 55840843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55840843) 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, 30664 + ... + 32433.

It is an arithmetic number, because the mean of its divisors is an integer number (5678820).

Almost surely, 2^55840845 is an apocalyptic number.

It is an amenable number.

55840845 is a deficient number, since it is larger than the sum of its proper divisors (35020275).

55840845 is a wasteful number, since it uses less digits than its factorization.

55840845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63164.

The product of its (nonzero) digits is 128000, while the sum is 39.

The square root of 55840845 is about 7472.6732164601. The cubic root of 55840845 is about 382.2234491233.

The spelling of 55840845 in words is "fifty-five million, eight hundred forty thousand, eight hundred forty-five".