55040064 has 56 divisors (see below), whose sum is σ = 146182080. Its totient is φ = 18276864.

The previous prime is 55040059. The next prime is 55040071. The reversal of 55040064 is 46004055.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83962 + ... + 84614.

Almost surely, 2^55040064 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 55040064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73091040).

55040064 is an abundant number, since it is smaller than the sum of its proper divisors (91142016).

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

55040064 is a wasteful number, since it uses less digits than its factorization.

55040064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55040064 is about 7418.8991097062. The cubic root of 55040064 is about 380.3875639593.

The spelling of 55040064 in words is "fifty-five million, forty thousand, sixty-four".