25978193013 has 8 divisors (see below), whose sum is σ = 34641388800. Its totient is φ = 17316896288.

The previous prime is 25978192979. The next prime is 25978193041. The reversal of 25978193013 is 31039187952.

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 25978193013 - 2²⁰ = 25977144437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25978193083) 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, 442533 + ... + 497786.

It is an arithmetic number, because the mean of its divisors is an integer number (4330173600).

Almost surely, 2^25978193013 is an apocalyptic number.

It is an amenable number.

25978193013 is a deficient number, since it is larger than the sum of its proper divisors (8663195787).

25978193013 is an equidigital number, since it uses as much as digits as its factorization.

25978193013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949531.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 25978193013 in words is "twenty-five billion, nine hundred seventy-eight million, one hundred ninety-three thousand, thirteen".