25376609540 has 12 divisors (see below), whose sum is σ = 53290880076. Its totient is φ = 10150643808.

The previous prime is 25376609537. The next prime is 25376609591. The reversal of 25376609540 is 4590667352.

It can be written as a sum of positive squares in 2 ways, for example, as 10720117444 + 14656492096 = 103538^2 + 121064^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634415219 + ... + 634415258.

It is an arithmetic number, because the mean of its divisors is an integer number (4440906673).

Almost surely, 2^25376609540 is an apocalyptic number.

25376609540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25376609540 is an abundant number, since it is smaller than the sum of its proper divisors (27914270536).

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

25376609540 is a wasteful number, since it uses less digits than its factorization.

25376609540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268830486 (or 1268830484 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 25376609540 in words is "twenty-five billion, three hundred seventy-six million, six hundred nine thousand, five hundred forty".