25891082280 has 576 divisors, whose sum is σ = 103768554240. Its totient is φ = 5482266624.

The previous prime is 25891082233. The next prime is 25891082303. The reversal of 25891082280 is 8228019852.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 53164197 + ... + 53164683.

It is an arithmetic number, because the mean of its divisors is an integer number (180153740).

Almost surely, 2^25891082280 is an apocalyptic number.

25891082280 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 25891082280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51884277120).

25891082280 is an abundant number, since it is smaller than the sum of its proper divisors (77877471960).

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

25891082280 is a wasteful number, since it uses less digits than its factorization.

25891082280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 25891082280 in words is "twenty-five billion, eight hundred ninety-one million, eighty-two thousand, two hundred eighty".