25538743434486 has 64 divisors (see below), whose sum is σ = 54636159191040. Its totient is φ = 7930117977600.

The previous prime is 25538743434481. The next prime is 25538743434527. The reversal of 25538743434486 is 68443434783552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25538743434481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29855835 + ... + 30699321.

It is an arithmetic number, because the mean of its divisors is an integer number (853689987360).

Almost surely, 2^{25538743434486} is an apocalyptic number.

25538743434486 is an abundant number, since it is smaller than the sum of its proper divisors (29097415756554).

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

25538743434486 is a wasteful number, since it uses less digits than its factorization.

25538743434486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846549.

The product of its digits is 928972800, while the sum is 66.

The spelling of 25538743434486 in words is "twenty-five trillion, five hundred thirty-eight billion, seven hundred forty-three million, four hundred thirty-four thousand, four hundred eighty-six".