55290645 has 24 divisors (see below), whose sum is σ = 96741216. Its totient is φ = 29210208.

The previous prime is 55290623. The next prime is 55290649. The reversal of 55290645 is 54609255.

55290645 is a `hidden beast` number, since 5 + 5 + 2 + 9 + 0 + 645 = 666.

It is not a de Polignac number, because 55290645 - 2⁶ = 55290581 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55290649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 927 + ... + 10556.

It is an arithmetic number, because the mean of its divisors is an integer number (4030884).

Almost surely, 2^55290645 is an apocalyptic number.

It is an amenable number.

55290645 is a deficient number, since it is larger than the sum of its proper divisors (41450571).

55290645 is a wasteful number, since it uses less digits than its factorization.

55290645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11601 (or 11598 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 55290645 is about 7435.7679495799. The cubic root of 55290645 is about 380.9639538511.

The spelling of 55290645 in words is "fifty-five million, two hundred ninety thousand, six hundred forty-five".