25244248440 has 64 divisors (see below), whose sum is σ = 76129320960. Its totient is φ = 6696548480.

The previous prime is 25244248399. The next prime is 25244248441. The reversal of 25244248440 is 4484244252.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25244248441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 527784 + ... + 573623.

It is an arithmetic number, because the mean of its divisors is an integer number (1189520640).

Almost surely, 2^25244248440 is an apocalyptic number.

25244248440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25244248440 is an abundant number, since it is smaller than the sum of its proper divisors (50885072520).

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

25244248440 is a wasteful number, since it uses less digits than its factorization.

25244248440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101612 (or 1101608 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 39.

The spelling of 25244248440 in words is "twenty-five billion, two hundred forty-four million, two hundred forty-eight thousand, four hundred forty".