25925490209490 has 256 divisors, whose sum is σ = 69357356974080. Its totient is φ = 6175599978240.

The previous prime is 25925490209453. The next prime is 25925490209491. The reversal of 25925490209490 is 9490209452952.

It is not an unprimeable number, because it can be changed into a prime (25925490209491) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 185129277 + ... + 185269263.

It is an arithmetic number, because the mean of its divisors is an integer number (270927175680).

Almost surely, 2^{25925490209490} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25925490209490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34678678487040).

25925490209490 is an abundant number, since it is smaller than the sum of its proper divisors (43431866764590).

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

25925490209490 is a wasteful number, since it uses less digits than its factorization.

25925490209490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140317.

The product of its (nonzero) digits is 20995200, while the sum is 60.

The spelling of 25925490209490 in words is "twenty-five trillion, nine hundred twenty-five billion, four hundred ninety million, two hundred nine thousand, four hundred ninety".