556660177240 has 128 divisors (see below), whose sum is σ = 1280807510400. Its totient is φ = 217689292800.

The previous prime is 556660177187. The next prime is 556660177247. The reversal of 556660177240 is 42771066655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556660177247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261464496 + ... + 261466624.

It is an arithmetic number, because the mean of its divisors is an integer number (10006308675).

Almost surely, 2^556660177240 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 556660177240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640403755200).

556660177240 is an abundant number, since it is smaller than the sum of its proper divisors (724147333160).

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

556660177240 is a wasteful number, since it uses less digits than its factorization.

556660177240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 556660177240 in words is "five hundred fifty-six billion, six hundred sixty million, one hundred seventy-seven thousand, two hundred forty".