825625358991 has 6 divisors (see below), whose sum is σ = 1192569963000. Its totient is φ = 550416905988.

The previous prime is 825625358989. The next prime is 825625359023. The reversal of 825625358991 is 199853526528.

825625358991 is a `hidden beast` number, since 8 + 2 + 5 + 6 + 2 + 535 + 8 + 9 + 91 = 666.

It is not a de Polignac number, because 825625358991 - 2¹ = 825625358989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825625398991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45868075491 + ... + 45868075508.

It is an arithmetic number, because the mean of its divisors is an integer number (198761660500).

Almost surely, 2^825625358991 is an apocalyptic number.

825625358991 is a deficient number, since it is larger than the sum of its proper divisors (366944604009).

825625358991 is a wasteful number, since it uses less digits than its factorization.

825625358991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91736151005 (or 91736151002 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 63.

The spelling of 825625358991 in words is "eight hundred twenty-five billion, six hundred twenty-five million, three hundred fifty-eight thousand, nine hundred ninety-one".