25191712993 has 8 divisors (see below), whose sum is σ = 26015822336. Its totient is φ = 24368320800.

The previous prime is 25191712963. The next prime is 25191712999. The reversal of 25191712993 is 39921719152.

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 25191712993 - 2²⁹ = 24654842081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25191712999) 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, 107421 + ... + 248842.

It is an arithmetic number, because the mean of its divisors is an integer number (3251977792).

Almost surely, 2^25191712993 is an apocalyptic number.

It is an amenable number.

25191712993 is a deficient number, since it is larger than the sum of its proper divisors (824109343).

25191712993 is a wasteful number, since it uses less digits than its factorization.

25191712993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358575.

The product of its digits is 306180, while the sum is 49.

The spelling of 25191712993 in words is "twenty-five billion, one hundred ninety-one million, seven hundred twelve thousand, nine hundred ninety-three".