25791099643 has 8 divisors (see below), whose sum is σ = 27188640720. Its totient is φ = 24397570080.

The previous prime is 25791099623. The next prime is 25791099671. The reversal of 25791099643 is 34699019752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25791099643 - 2²⁵ = 25757545211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25791099623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989668 + ... + 1015393.

It is an arithmetic number, because the mean of its divisors is an integer number (3398580090).

Almost surely, 2^25791099643 is an apocalyptic number.

25791099643 is a deficient number, since it is larger than the sum of its proper divisors (1397541077).

25791099643 is a wasteful number, since it uses less digits than its factorization.

25791099643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005757.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 25791099643 in words is "twenty-five billion, seven hundred ninety-one million, ninety-nine thousand, six hundred forty-three".