55550736 has 90 divisors (see below), whose sum is σ = 160915482. Its totient is φ = 17879040.

The previous prime is 55550723. The next prime is 55550753. The reversal of 55550736 is 63705555.

It can be written as a sum of positive squares in 3 ways, for example, as 197136 + 55353600 = 444^2 + 7440^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55550736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 572640 + ... + 572736.

Almost surely, 2^55550736 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 55550736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80457741).

55550736 is an abundant number, since it is smaller than the sum of its proper divisors (105364746).

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

55550736 is a wasteful number, since it uses less digits than its factorization.

55550736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The square root of 55550736 is about 7453.2366123718. The cubic root of 55550736 is about 381.5603798376.

The spelling of 55550736 in words is "fifty-five million, five hundred fifty thousand, seven hundred thirty-six".