25815158255780 has 12 divisors (see below), whose sum is σ = 54211832337180. Its totient is φ = 10326063302304.

The previous prime is 25815158255767. The next prime is 25815158255791. The reversal of 25815158255780 is 8755285151852.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3701614385764 + 22113543870016 = 1923958^2 + 4702504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645378956375 + ... + 645378956414.

It is an arithmetic number, because the mean of its divisors is an integer number (4517652694765).

Almost surely, 2^{25815158255780} is an apocalyptic number.

25815158255780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25815158255780 is an abundant number, since it is smaller than the sum of its proper divisors (28396674081400).

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

25815158255780 is a wasteful number, since it uses less digits than its factorization.

25815158255780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290757912798 (or 1290757912796 counting only the distinct ones).

The product of its (nonzero) digits is 44800000, while the sum is 62.

The spelling of 25815158255780 in words is "twenty-five trillion, eight hundred fifteen billion, one hundred fifty-eight million, two hundred fifty-five thousand, seven hundred eighty".