25013502540 has 192 divisors, whose sum is σ = 83897251200. Its totient is φ = 6150463488.

The previous prime is 25013502539. The next prime is 25013502581. The reversal of 25013502540 is 4520531052.

It is a happy number.

25013502540 is a `hidden beast` number, since 250 + 1 + 350 + 25 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10451584 + ... + 10453976.

It is an arithmetic number, because the mean of its divisors is an integer number (436964850).

Almost surely, 2^25013502540 is an apocalyptic number.

25013502540 is a gapful number since it is divisible by the number (20) 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 25013502540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41948625600).

25013502540 is an abundant number, since it is smaller than the sum of its proper divisors (58883748660).

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

25013502540 is a wasteful number, since it uses less digits than its factorization.

25013502540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 25013502540 in words is "twenty-five billion, thirteen million, five hundred two thousand, five hundred forty".