2539649500 has 24 divisors (see below), whose sum is σ = 5546595600. Its totient is φ = 1015859600.

The previous prime is 2539649377. The next prime is 2539649501. The reversal of 2539649500 is 59469352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539649501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2539150 + ... + 2540149.

It is an arithmetic number, because the mean of its divisors is an integer number (231108150).

Almost surely, 2^2539649500 is an apocalyptic number.

2539649500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539649500 is an abundant number, since it is smaller than the sum of its proper divisors (3006946100).

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

2539649500 is a wasteful number, since it uses less digits than its factorization.

2539649500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079318 (or 5079306 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 2539649500 is about 50394.9352613931. The cubic root of 2539649500 is about 1364.3462276432.

The spelling of 2539649500 in words is "two billion, five hundred thirty-nine million, six hundred forty-nine thousand, five hundred".