55643458 has 16 divisors (see below), whose sum is σ = 90107136. Its totient is φ = 25618320.

The previous prime is 55643453. The next prime is 55643459. The reversal of 55643458 is 85434655.

It is a self number, because there is not a number n which added to its sum of digits gives 55643458.

It is not an unprimeable number, because it can be changed into a prime (55643453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9103 + ... + 13933.

It is an arithmetic number, because the mean of its divisors is an integer number (5631696).

Almost surely, 2^55643458 is an apocalyptic number.

55643458 is a deficient number, since it is larger than the sum of its proper divisors (34463678).

55643458 is a wasteful number, since it uses less digits than its factorization.

55643458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289.

The product of its digits is 288000, while the sum is 40.

The square root of 55643458 is about 7459.4542695830. The cubic root of 55643458 is about 381.7725544976.

The spelling of 55643458 in words is "fifty-five million, six hundred forty-three thousand, four hundred fifty-eight".