25972712991 has 8 divisors (see below), whose sum is σ = 38478093360. Its totient is φ = 17315141976.

The previous prime is 25972712963. The next prime is 25972713023. The reversal of 25972712991 is 19921727952.

25972712991 is a `hidden beast` number, since 2 + 597 + 27 + 1 + 29 + 9 + 1 = 666.

It is not a de Polignac number, because 25972712991 - 2⁵ = 25972712959 is a prime.

It is a super-2 number, since 2×25972712991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25972712291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480976140 + ... + 480976193.

It is an arithmetic number, because the mean of its divisors is an integer number (4809761670).

Almost surely, 2^25972712991 is an apocalyptic number.

25972712991 is a deficient number, since it is larger than the sum of its proper divisors (12505380369).

25972712991 is an equidigital number, since it uses as much as digits as its factorization.

25972712991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961952342 (or 961952336 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The spelling of 25972712991 in words is "twenty-five billion, nine hundred seventy-two million, seven hundred twelve thousand, nine hundred ninety-one".