25272381840 has 160 divisors (see below), whose sum is σ = 83630361600. Its totient is φ = 6294597120.

The previous prime is 25272381811. The next prime is 25272381851. The reversal of 25272381840 is 4818327252.

It is a junction number, because it is equal to n+sod(n) for n = 25272381792 and 25272381801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284731 + ... + 362789.

It is an arithmetic number, because the mean of its divisors is an integer number (522689760).

Almost surely, 2^25272381840 is an apocalyptic number.

25272381840 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 25272381840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41815180800).

25272381840 is an abundant number, since it is smaller than the sum of its proper divisors (58357979760).

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

25272381840 is a wasteful number, since it uses less digits than its factorization.

25272381840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78165 (or 78159 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 25272381840 in words is "twenty-five billion, two hundred seventy-two million, three hundred eighty-one thousand, eight hundred forty".