2539706568 has 160 divisors (see below), whose sum is σ = 7752413760. Its totient is φ = 679173120.

The previous prime is 2539706557. The next prime is 2539706597. The reversal of 2539706568 is 8656079352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 2539706568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14031438 + ... + 14031618.

It is an arithmetic number, because the mean of its divisors is an integer number (48452586).

Almost surely, 2^2539706568 is an apocalyptic number.

2539706568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2539706568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3876206880).

2539706568 is an abundant number, since it is smaller than the sum of its proper divisors (5212707192).

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

2539706568 is an equidigital number, since it uses as much as digits as its factorization.

2539706568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 2539706568 is about 50395.5014659047. The cubic root of 2539706568 is about 1364.3564468916.

The spelling of 2539706568 in words is "two billion, five hundred thirty-nine million, seven hundred six thousand, five hundred sixty-eight".