55553638 has 16 divisors (see below), whose sum is σ = 95639040. Its totient is φ = 23707656.

The previous prime is 55553629. The next prime is 55553639. The reversal of 55553638 is 83635555.

It is a self number, because there is not a number n which added to its sum of digits gives 55553638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55553639) 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, 4956 + ... + 11647.

It is an arithmetic number, because the mean of its divisors is an integer number (5977440).

Almost surely, 2^55553638 is an apocalyptic number.

55553638 is a deficient number, since it is larger than the sum of its proper divisors (40085402).

55553638 is a wasteful number, since it uses less digits than its factorization.

55553638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851.

The product of its digits is 270000, while the sum is 40.

The square root of 55553638 is about 7453.4312903521. The cubic root of 55553638 is about 381.5670240276.

The spelling of 55553638 in words is "fifty-five million, five hundred fifty-three thousand, six hundred thirty-eight".