25515079980 has 48 divisors (see below), whose sum is σ = 76937781984. Its totient is φ = 6280634880.

The previous prime is 25515079897. The next prime is 25515079999. The reversal of 25515079980 is 8997051552.

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, 16355041 + ... + 16356600.

It is an arithmetic number, because the mean of its divisors is an integer number (1602870458).

Almost surely, 2^25515079980 is an apocalyptic number.

25515079980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25515079980 is an abundant number, since it is smaller than the sum of its proper divisors (51422702004).

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

25515079980 is a wasteful number, since it uses less digits than its factorization.

25515079980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32711666 (or 32711664 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 51.

The spelling of 25515079980 in words is "twenty-five billion, five hundred fifteen million, seventy-nine thousand, nine hundred eighty".