25538939435 has 16 divisors (see below), whose sum is σ = 32465383200. Its totient is φ = 19219892736.

The previous prime is 25538939429. The next prime is 25538939443. The reversal of 25538939435 is 53493983552.

It is a cyclic number.

It is not a de Polignac number, because 25538939435 - 2²⁴ = 25522162219 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103256 + ... + 248474.

It is an arithmetic number, because the mean of its divisors is an integer number (2029086450).

Almost surely, 2^25538939435 is an apocalyptic number.

25538939435 is a deficient number, since it is larger than the sum of its proper divisors (6926443765).

25538939435 is a wasteful number, since it uses less digits than its factorization.

25538939435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147310.

The product of its digits is 17496000, while the sum is 56.

The spelling of 25538939435 in words is "twenty-five billion, five hundred thirty-eight million, nine hundred thirty-nine thousand, four hundred thirty-five".