55386636 has 24 divisors (see below), whose sum is σ = 133692720. Its totient is φ = 17825472.

The previous prime is 55386631. The next prime is 55386641. The reversal of 55386636 is 63668355.

It is an interprime number because it is at equal distance from previous prime (55386631) and next prime (55386641).

It is not an unprimeable number, because it can be changed into a prime (55386631) 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, 79231 + ... + 79926.

It is an arithmetic number, because the mean of its divisors is an integer number (5570530).

Almost surely, 2^55386636 is an apocalyptic number.

It is an amenable number.

55386636 is an abundant number, since it is smaller than the sum of its proper divisors (78306084).

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

55386636 is a wasteful number, since it uses less digits than its factorization.

55386636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159193 (or 159191 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 55386636 is about 7442.2198301313. The cubic root of 55386636 is about 381.1842923220.

The spelling of 55386636 in words is "fifty-five million, three hundred eighty-six thousand, six hundred thirty-six".