25432121771280 has 960 divisors, whose sum is σ = 101883229913088. Its totient is φ = 5563002654720.

The previous prime is 25432121771261. The next prime is 25432121771293. The reversal of 25432121771280 is 8217712123452.

25432121771280 is a `hidden beast` number, since 2 + 5 + 432 + 1 + 21 + 77 + 128 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13156813194 + ... + 13156815126.

Almost surely, 2^{25432121771280} is an apocalyptic number.

25432121771280 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 25432121771280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50941614956544).

25432121771280 is an abundant number, since it is smaller than the sum of its proper divisors (76451108141808).

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

25432121771280 is a wasteful number, since it uses less digits than its factorization.

25432121771280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884 (or 2875 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 25432121771280 in words is "twenty-five trillion, four hundred thirty-two billion, one hundred twenty-one million, seven hundred seventy-one thousand, two hundred eighty".