25246805140 has 48 divisors (see below), whose sum is σ = 55378753920. Its totient is φ = 9649988480.

The previous prime is 25246805083. The next prime is 25246805153. The reversal of 25246805140 is 4150864252.

It is a self number, because there is not a number n which added to its sum of digits gives 25246805140.

It is a congruent number.

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, 441810 + ... + 495670.

It is an arithmetic number, because the mean of its divisors is an integer number (1153724040).

Almost surely, 2^25246805140 is an apocalyptic number.

25246805140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25246805140 is an abundant number, since it is smaller than the sum of its proper divisors (30131948780).

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

25246805140 is a wasteful number, since it uses less digits than its factorization.

25246805140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54912 (or 54910 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 25246805140 in words is "twenty-five billion, two hundred forty-six million, eight hundred five thousand, one hundred forty".