825688831957 has 4 divisors (see below), whose sum is σ = 900751453056. Its totient is φ = 750626210860.

The previous prime is 825688831939. The next prime is 825688831963. The reversal of 825688831957 is 759138886528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 825688831957 - 2¹⁵ = 825688799189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825688831907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37531310533 + ... + 37531310554.

It is an arithmetic number, because the mean of its divisors is an integer number (225187863264).

Almost surely, 2^825688831957 is an apocalyptic number.

It is an amenable number.

825688831957 is a deficient number, since it is larger than the sum of its proper divisors (75062621099).

825688831957 is a wasteful number, since it uses less digits than its factorization.

825688831957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75062621098.

The product of its digits is 232243200, while the sum is 70.

The spelling of 825688831957 in words is "eight hundred twenty-five billion, six hundred eighty-eight million, eight hundred thirty-one thousand, nine hundred fifty-seven".