25916539793 has 4 divisors (see below), whose sum is σ = 25919300148. Its totient is φ = 25913779440.

The previous prime is 25916539739. The next prime is 25916539813. The reversal of 25916539793 is 39793561952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6900957184 + 19015582609 = 83072^2 + 137897^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25916539793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25916539723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1366046 + ... + 1384887.

It is an arithmetic number, because the mean of its divisors is an integer number (6479825037).

Almost surely, 2^25916539793 is an apocalyptic number.

It is an amenable number.

25916539793 is a deficient number, since it is larger than the sum of its proper divisors (2760355).

25916539793 is an equidigital number, since it uses as much as digits as its factorization.

25916539793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760354.

The product of its digits is 13778100, while the sum is 59.

The spelling of 25916539793 in words is "twenty-five billion, nine hundred sixteen million, five hundred thirty-nine thousand, seven hundred ninety-three".