25274268440 has 32 divisors (see below), whose sum is σ = 57083352480. Its totient is φ = 10071263232.

The previous prime is 25274268433. The next prime is 25274268479. The reversal of 25274268440 is 4486247252.

It is a junction number, because it is equal to n+sod(n) for n = 25274268391 and 25274268400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190729 + ... + 1211768.

It is an arithmetic number, because the mean of its divisors is an integer number (1783854765).

Almost surely, 2^25274268440 is an apocalyptic number.

25274268440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25274268440 is an abundant number, since it is smaller than the sum of its proper divisors (31809084040).

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

25274268440 is a wasteful number, since it uses less digits than its factorization.

25274268440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402771 (or 2402767 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 44.

The spelling of 25274268440 in words is "twenty-five billion, two hundred seventy-four million, two hundred sixty-eight thousand, four hundred forty".