25538533225280 has 112 divisors (see below), whose sum is σ = 61515459259920. Its totient is φ = 10097590272000.

The previous prime is 25538533225279. The next prime is 25538533225339. The reversal of 25538533225280 is 8252233583552.

It can be written as a sum of positive squares in 8 ways, for example, as 2542902243904 + 22995630981376 = 1594648^2 + 4795376^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95587880 + ... + 95854680.

Almost surely, 2^{25538533225280} is an apocalyptic number.

25538533225280 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 25538533225280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30757729629960).

25538533225280 is an abundant number, since it is smaller than the sum of its proper divisors (35976926034640).

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

25538533225280 is a wasteful number, since it uses less digits than its factorization.

25538533225280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270268 (or 270258 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 53.

The spelling of 25538533225280 in words is "twenty-five trillion, five hundred thirty-eight billion, five hundred thirty-three million, two hundred twenty-five thousand, two hundred eighty".