825610672267921 has 16 divisors (see below), whose sum is σ = 870037331405760. Its totient is φ = 781281778129920.

The previous prime is 825610672267853. The next prime is 825610672268069. The reversal of 825610672267921 is 129762276016528.

It is a cyclic number.

It is not a de Polignac number, because 825610672267921 - 2¹⁹ = 825610671743633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825410672267921) 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, 65251305 + ... + 76869721.

It is an arithmetic number, because the mean of its divisors is an integer number (54377333212860).

Almost surely, 2^{825610672267921} is an apocalyptic number.

It is an amenable number.

825610672267921 is a deficient number, since it is larger than the sum of its proper divisors (44426659137839).

825610672267921 is a wasteful number, since it uses less digits than its factorization.

825610672267921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11622624.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 825610672267921 in words is "eight hundred twenty-five trillion, six hundred ten billion, six hundred seventy-two million, two hundred sixty-seven thousand, nine hundred twenty-one".