55495872 has 168 divisors, whose sum is σ = 171175680. Its totient is φ = 17149440.

The previous prime is 55495831. The next prime is 55495873. The reversal of 55495872 is 27859455.

55495872 is a `hidden beast` number, since 554 + 95 + 8 + 7 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55495873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781597 + ... + 781667.

Almost surely, 2^55495872 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 55495872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85587840).

55495872 is an abundant number, since it is smaller than the sum of its proper divisors (115679808).

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

55495872 is a wasteful number, since it uses less digits than its factorization.

55495872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 158 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 55495872 is about 7449.5551545042. Note that the first 3 decimals coincide. The cubic root of 55495872 is about 381.4347239916.

The spelling of 55495872 in words is "fifty-five million, four hundred ninety-five thousand, eight hundred seventy-two".