55061784 has 48 divisors (see below), whose sum is σ = 150106320. Its totient is φ = 18233280.

The previous prime is 55061779. The next prime is 55061803. The reversal of 55061784 is 48716055.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8869 + ... + 13739.

It is an arithmetic number, because the mean of its divisors is an integer number (3127215).

Almost surely, 2^55061784 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 55061784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75053160).

55061784 is an abundant number, since it is smaller than the sum of its proper divisors (95044536).

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

55061784 is a wasteful number, since it uses less digits than its factorization.

55061784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55061784 is about 7420.3627943652. The cubic root of 55061784 is about 380.4375937662.

The spelling of 55061784 in words is "fifty-five million, sixty-one thousand, seven hundred eighty-four".