825722636 has 24 divisors (see below), whose sum is σ = 1518594000. Its totient is φ = 392357952.

The previous prime is 825722591. The next prime is 825722671. The reversal of 825722636 is 636227528.

It is a junction number, because it is equal to n+sod(n) for n = 825722593 and 825722602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58511 + ... + 71238.

It is an arithmetic number, because the mean of its divisors is an integer number (63274750).

Almost surely, 2^825722636 is an apocalyptic number.

825722636 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

825722636 is a deficient number, since it is larger than the sum of its proper divisors (692871364).

825722636 is a wasteful number, since it uses less digits than its factorization.

825722636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129833 (or 129831 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 825722636 is about 28735.3899573331. The cubic root of 825722636 is about 938.1624870244.

The spelling of 825722636 in words is "eight hundred twenty-five million, seven hundred twenty-two thousand, six hundred thirty-six".