25780911002136 has 192 divisors, whose sum is σ = 73895499849600. Its totient is φ = 8097351929856.

The previous prime is 25780911002027. The next prime is 25780911002137. The reversal of 25780911002136 is 63120011908752.

25780911002136 is a `hidden beast` number, since 257 + 80 + 9 + 1 + 100 + 213 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25780911002091 and 25780911002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780911002137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1669416031 + ... + 1669431473.

It is an arithmetic number, because the mean of its divisors is an integer number (384872395050).

Almost surely, 2^{25780911002136} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25780911002136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36947749924800).

25780911002136 is an abundant number, since it is smaller than the sum of its proper divisors (48114588847464).

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

25780911002136 is a wasteful number, since it uses less digits than its factorization.

25780911002136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21990 (or 21983 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 25780911002136 in words is "twenty-five trillion, seven hundred eighty billion, nine hundred eleven million, two thousand, one hundred thirty-six".