55368636 has 48 divisors (see below), whose sum is σ = 136491264. Its totient is φ = 17433856.

The previous prime is 55368631. The next prime is 55368637. The reversal of 55368636 is 63686355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55368631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21700 + ... + 24116.

It is an arithmetic number, because the mean of its divisors is an integer number (2843568).

Almost surely, 2^55368636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55368636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68245632).

55368636 is an abundant number, since it is smaller than the sum of its proper divisors (81122628).

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

55368636 is a wasteful number, since it uses less digits than its factorization.

55368636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2528 counting only the distinct ones).

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

The square root of 55368636 is about 7441.0104152595. The cubic root of 55368636 is about 381.1429943895.

The spelling of 55368636 in words is "fifty-five million, three hundred sixty-eight thousand, six hundred thirty-six".