55639895 has 8 divisors (see below), whose sum is σ = 70695504. Its totient is φ = 41893504.

The previous prime is 55639889. The next prime is 55639907. The reversal of 55639895 is 59893655.

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

It is a cyclic number.

It is not a de Polignac number, because 55639895 - 2²⁰ = 54591319 is a prime.

It is a super-2 number, since 2×55639895² = 6191595831222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327209 + ... + 327378.

It is an arithmetic number, because the mean of its divisors is an integer number (8836938).

Almost surely, 2^55639895 is an apocalyptic number.

55639895 is a deficient number, since it is larger than the sum of its proper divisors (15055609).

55639895 is a wasteful number, since it uses less digits than its factorization.

55639895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654609.

The product of its digits is 1458000, while the sum is 50.

The square root of 55639895 is about 7459.2154413182. The cubic root of 55639895 is about 381.7644056831.

The spelling of 55639895 in words is "fifty-five million, six hundred thirty-nine thousand, eight hundred ninety-five".