25002405990 has 192 divisors, whose sum is σ = 69259432320. Its totient is φ = 6244761600.

The previous prime is 25002405983. The next prime is 25002406007. The reversal of 25002405990 is 9950420052.

It is a happy number.

25002405990 is a `hidden beast` number, since 25 + 0 + 0 + 2 + 40 + 599 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20817390 + ... + 20818590.

It is an arithmetic number, because the mean of its divisors is an integer number (360726210).

Almost surely, 2^25002405990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25002405990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34629716160).

25002405990 is an abundant number, since it is smaller than the sum of its proper divisors (44257026330).

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

25002405990 is a wasteful number, since it uses less digits than its factorization.

25002405990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1436 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 25002405990 in words is "twenty-five billion, two million, four hundred five thousand, nine hundred ninety".