2500261536 has 144 divisors (see below), whose sum is σ = 7020318816. Its totient is φ = 778973184.

The previous prime is 2500261523. The next prime is 2500261537. The reversal of 2500261536 is 6351620052.

It is not an unprimeable number, because it can be changed into a prime (2500261537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6297690 + ... + 6298086.

It is an arithmetic number, because the mean of its divisors is an integer number (48752214).

Almost surely, 2^2500261536 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 2500261536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3510159408).

2500261536 is an abundant number, since it is smaller than the sum of its proper divisors (4520057280).

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

2500261536 is a wasteful number, since it uses less digits than its factorization.

2500261536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2500261536 is about 50002.6152916025. The cubic root of 2500261536 is about 1357.2561345089.

Adding to 2500261536 its reverse (6351620052), we get a palindrome (8851881588).

The spelling of 2500261536 in words is "two billion, five hundred million, two hundred sixty-one thousand, five hundred thirty-six".