25504399438008 has 128 divisors (see below), whose sum is σ = 65233050624000. Its totient is φ = 8306549222400.

The previous prime is 25504399437989. The next prime is 25504399438009. The reversal of 25504399438008 is 80083499340552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25504399438009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826948668 + ... + 826979508.

It is an arithmetic number, because the mean of its divisors is an integer number (509633208000).

Almost surely, 2^{25504399438008} 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 25504399438008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32616525312000).

25504399438008 is an abundant number, since it is smaller than the sum of its proper divisors (39728651185992).

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

25504399438008 is a wasteful number, since it uses less digits than its factorization.

25504399438008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33573 (or 33569 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 60.

The spelling of 25504399438008 in words is "twenty-five trillion, five hundred four billion, three hundred ninety-nine million, four hundred thirty-eight thousand, eight".