25781880732320 has 96 divisors (see below), whose sum is σ = 64713001626000. Its totient is φ = 9688028184576.

The previous prime is 25781880732269. The next prime is 25781880732359. The reversal of 25781880732320 is 2323708818752.

It can be written as a sum of positive squares in 8 ways, for example, as 19024147742224 + 6757732990096 = 4361668^2 + 2599564^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74915345 + ... + 75258704.

Almost surely, 2^{25781880732320} is an apocalyptic number.

25781880732320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25781880732320 is an abundant number, since it is smaller than the sum of its proper divisors (38931120893680).

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

25781880732320 is a wasteful number, since it uses less digits than its factorization.

25781880732320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150174130 (or 150174122 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 25781880732320 in words is "twenty-five trillion, seven hundred eighty-one billion, eight hundred eighty million, seven hundred thirty-two thousand, three hundred twenty".