55556740 has 12 divisors (see below), whose sum is σ = 116669196. Its totient is φ = 22222688.

The previous prime is 55556717. The next prime is 55556747. The reversal of 55556740 is 4765555.

It can be written as a sum of positive squares in 2 ways, for example, as 5769604 + 49787136 = 2402^2 + 7056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55556740.

It is not an unprimeable number, because it can be changed into a prime (55556747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388899 + ... + 1388938.

It is an arithmetic number, because the mean of its divisors is an integer number (9722433).

Almost surely, 2^55556740 is an apocalyptic number.

It is an amenable number.

55556740 is an abundant number, since it is smaller than the sum of its proper divisors (61112456).

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

55556740 is a wasteful number, since it uses less digits than its factorization.

55556740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777846 (or 2777844 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 55556740 is about 7453.6393795246. The cubic root of 55556740 is about 381.5741258660.

The spelling of 55556740 in words is "fifty-five million, five hundred fifty-six thousand, seven hundred forty".