55643445 has 48 divisors (see below), whose sum is σ = 113323392. Its totient is φ = 24900480.

The previous prime is 55643387. The next prime is 55643453. The reversal of 55643445 is 54434655.

55643445 is a `hidden beast` number, since 5 + 5 + 643 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 55643445 - 2¹⁶ = 55577909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2112 + ... + 10758.

It is an arithmetic number, because the mean of its divisors is an integer number (2360904).

Almost surely, 2^55643445 is an apocalyptic number.

55643445 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55643445 is an abundant number, since it is smaller than the sum of its proper divisors (57679947).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55643445 is a wasteful number, since it uses less digits than its factorization.

55643445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8682 (or 8679 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 55643445 is about 7459.4533982055. The cubic root of 55643445 is about 381.7725247664.

It can be divided in two parts, 5564 and 3445, that added together give a palindrome (9009).

The spelling of 55643445 in words is "fifty-five million, six hundred forty-three thousand, four hundred forty-five".