55640485 has 16 divisors (see below), whose sum is σ = 69435072. Its totient is φ = 42768000.

The previous prime is 55640477. The next prime is 55640509. The reversal of 55640485 is 58404655.

It is not a de Polignac number, because 55640485 - 2³ = 55640477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11710 + ... + 15760.

It is an arithmetic number, because the mean of its divisors is an integer number (4339692).

Almost surely, 2^55640485 is an apocalyptic number.

It is an amenable number.

55640485 is a deficient number, since it is larger than the sum of its proper divisors (13794587).

55640485 is a wasteful number, since it uses less digits than its factorization.

55640485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 96000, while the sum is 37.

The square root of 55640485 is about 7459.2549896085. The cubic root of 55640485 is about 381.7657550758.

It can be divided in two parts, 556 and 40485, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 55640485 in words is "fifty-five million, six hundred forty thousand, four hundred eighty-five".