55643642 has 8 divisors (see below), whose sum is σ = 85501332. Its totient is φ = 27143200.

The previous prime is 55643639. The next prime is 55643681. The reversal of 55643642 is 24634655.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54007801 + 1635841 = 7349^2 + 1279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339209 + ... + 339372.

Almost surely, 2^55643642 is an apocalyptic number.

55643642 is a deficient number, since it is larger than the sum of its proper divisors (29857690).

55643642 is a wasteful number, since it uses less digits than its factorization.

55643642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678624.

The product of its digits is 86400, while the sum is 35.

The square root of 55643642 is about 7459.4666029147. The cubic root of 55643642 is about 381.7729753082.

The spelling of 55643642 in words is "fifty-five million, six hundred forty-three thousand, six hundred forty-two".