825846991605 has 64 divisors (see below), whose sum is σ = 1472245632000. Its totient is φ = 439231541760.

The previous prime is 825846991553. The next prime is 825846991639. The reversal of 825846991605 is 506199648528.

825846991605 is a `hidden beast` number, since 8 + 2 + 5 + 8 + 469 + 9 + 160 + 5 = 666.

It is not a de Polignac number, because 825846991605 - 2⁷ = 825846991477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76468996 + ... + 76479794.

It is an arithmetic number, because the mean of its divisors is an integer number (23003838000).

Almost surely, 2^825846991605 is an apocalyptic number.

It is an amenable number.

825846991605 is a deficient number, since it is larger than the sum of its proper divisors (646398640395).

825846991605 is a wasteful number, since it uses less digits than its factorization.

825846991605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12331 (or 12325 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 825846991605 in words is "eight hundred twenty-five billion, eight hundred forty-six million, nine hundred ninety-one thousand, six hundred five".