686222223722 has 24 divisors (see below), whose sum is σ = 1200514162176. Its totient is φ = 293327350008.

The previous prime is 686222223721. The next prime is 686222223749. The reversal of 686222223722 is 227322222686.

It is not an unprimeable number, because it can be changed into a prime (686222223721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9103808 + ... + 9178875.

It is an arithmetic number, because the mean of its divisors is an integer number (50021423424).

Almost surely, 2^686222223722 is an apocalyptic number.

686222223722 is a deficient number, since it is larger than the sum of its proper divisors (514291938454).

686222223722 is a wasteful number, since it uses less digits than its factorization.

686222223722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18283082 (or 18283075 counting only the distinct ones).

The product of its digits is 774144, while the sum is 44.

The spelling of 686222223722 in words is "six hundred eighty-six billion, two hundred twenty-two million, two hundred twenty-three thousand, seven hundred twenty-two".