25961001717607 has 16 divisors (see below), whose sum is σ = 29811941061120. Its totient is φ = 22358559124800.

The previous prime is 25961001717589. The next prime is 25961001717617. The reversal of 25961001717607 is 70671710016952.

It is a cyclic number.

It is not a de Polignac number, because 25961001717607 - 2¹¹ = 25961001715559 is a prime.

It is a super-2 number, since 2×25961001717607² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25961001717617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26156338 + ... + 27130720.

It is an arithmetic number, because the mean of its divisors is an integer number (1863246316320).

Almost surely, 2^{25961001717607} is an apocalyptic number.

25961001717607 is a deficient number, since it is larger than the sum of its proper divisors (3850939343513).

25961001717607 is a wasteful number, since it uses less digits than its factorization.

25961001717607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101894.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The spelling of 25961001717607 in words is "twenty-five trillion, nine hundred sixty-one billion, one million, seven hundred seventeen thousand, six hundred seven".