2539145556 has 60 divisors (see below), whose sum is σ = 6650427168. Its totient is φ = 844775568.

The previous prime is 2539145549. The next prime is 2539145599. The reversal of 2539145556 is 6555419352.

2539145556 is a `hidden beast` number, since 2 + 5 + 3 + 91 + 4 + 5 + 556 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170065 + ... + 184391.

Almost surely, 2^2539145556 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 2539145556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3325213584).

2539145556 is an abundant number, since it is smaller than the sum of its proper divisors (4111281612).

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

2539145556 is a wasteful number, since it uses less digits than its factorization.

2539145556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14890 (or 14879 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 2539145556 is about 50389.9350664396. The cubic root of 2539145556 is about 1364.2559790246.

The spelling of 2539145556 in words is "two billion, five hundred thirty-nine million, one hundred forty-five thousand, five hundred fifty-six".