825198681 has 16 divisors (see below), whose sum is σ = 1127706624. Its totient is φ = 536453904.

The previous prime is 825198653. The next prime is 825198697. The reversal of 825198681 is 186891528.

It is not a de Polignac number, because 825198681 - 2⁶ = 825198617 is a prime.

It is a super-2 number, since 2×825198681² = 1361905726248279522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 825198681.

It is not an unprimeable number, because it can be changed into a prime (825198601) 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, 78520 + ... + 88406.

It is an arithmetic number, because the mean of its divisors is an integer number (70481664).

Almost surely, 2^825198681 is an apocalyptic number.

It is an amenable number.

825198681 is a deficient number, since it is larger than the sum of its proper divisors (302507943).

825198681 is a wasteful number, since it uses less digits than its factorization.

825198681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580.

The product of its digits is 276480, while the sum is 48.

The square root of 825198681 is about 28726.2716167622. The cubic root of 825198681 is about 937.9640108001.

The spelling of 825198681 in words is "eight hundred twenty-five million, one hundred ninety-eight thousand, six hundred eighty-one".