82631393825 has 12 divisors (see below), whose sum is σ = 108490159980. Its totient is φ = 62216578560.

The previous prime is 82631393797. The next prime is 82631393833. The reversal of 82631393825 is 52839313628.

It can be written as a sum of positive squares in 6 ways, for example, as 3098369569 + 79533024256 = 55663^2 + 282016^2 .

It is not a de Polignac number, because 82631393825 - 2¹⁰ = 82631392801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97212980 + ... + 97213829.

It is an arithmetic number, because the mean of its divisors is an integer number (9040846665).

Almost surely, 2^82631393825 is an apocalyptic number.

82631393825 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

82631393825 is a deficient number, since it is larger than the sum of its proper divisors (25858766155).

82631393825 is a wasteful number, since it uses less digits than its factorization.

82631393825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194426836 (or 194426831 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The spelling of 82631393825 in words is "eighty-two billion, six hundred thirty-one million, three hundred ninety-three thousand, eight hundred twenty-five".