25260042440 has 64 divisors (see below), whose sum is σ = 57224534400. Its totient is φ = 10035007488.

The previous prime is 25260042439. The next prime is 25260042497. The reversal of 25260042440 is 4424006252.

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 15 ways as a sum of consecutive naturals, for example, 3982952 + ... + 3989288.

It is an arithmetic number, because the mean of its divisors is an integer number (894133350).

Almost surely, 2^25260042440 is an apocalyptic number.

25260042440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25260042440 is an abundant number, since it is smaller than the sum of its proper divisors (31964491960).

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

25260042440 is a wasteful number, since it uses less digits than its factorization.

25260042440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014 (or 7010 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 25260042440 its reverse (4424006252), we get a palindrome (29684048692).

The spelling of 25260042440 in words is "twenty-five billion, two hundred sixty million, forty-two thousand, four hundred forty".