25444274272 has 96 divisors (see below), whose sum is σ = 55116482400. Its totient is φ = 11508768768.

The previous prime is 25444274257. The next prime is 25444274309. The reversal of 25444274272 is 27247244452.

It is a happy number.

It is a super-2 number, since 2×25444274272² (a number of 22 digits) contains 22 as substring.

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, 3609183 + ... + 3616225.

It is an arithmetic number, because the mean of its divisors is an integer number (574130025).

Almost surely, 2^25444274272 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 25444274272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27558241200).

25444274272 is an abundant number, since it is smaller than the sum of its proper divisors (29672208128).

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

25444274272 is a wasteful number, since it uses less digits than its factorization.

25444274272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7328 (or 7320 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 43.

The spelling of 25444274272 in words is "twenty-five billion, four hundred forty-four million, two hundred seventy-four thousand, two hundred seventy-two".