2539944895590 has 384 divisors, whose sum is σ = 7432345589760. Its totient is φ = 621757513728.

The previous prime is 2539944895363. The next prime is 2539944895619. The reversal of 2539944895590 is 955984499352.

2539944895590 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 9 + 4 + 489 + 55 + 90 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 270864982 + ... + 270874358.

It is an arithmetic number, because the mean of its divisors is an integer number (19355066640).

Almost surely, 2^{2539944895590} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2539944895590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3716172794880).

2539944895590 is an abundant number, since it is smaller than the sum of its proper divisors (4892400694170).

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

2539944895590 is a wasteful number, since it uses less digits than its factorization.

2539944895590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578 (or 9566 counting only the distinct ones).

The product of its (nonzero) digits is 629856000, while the sum is 72.

The spelling of 2539944895590 in words is "two trillion, five hundred thirty-nine billion, nine hundred forty-four million, eight hundred ninety-five thousand, five hundred ninety".