685635552222 has 16 divisors (see below), whose sum is σ = 1373126689920. Its totient is φ = 228235919832.

The previous prime is 685635552211. The next prime is 685635552229. The reversal of 685635552222 is 222255536586.

685635552222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×685635552222² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685635552229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77311258 + ... + 77320125.

It is an arithmetic number, because the mean of its divisors is an integer number (85820418120).

Almost surely, 2^685635552222 is an apocalyptic number.

685635552222 is an abundant number, since it is smaller than the sum of its proper divisors (687491137698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685635552222 is a wasteful number, since it uses less digits than its factorization.

685635552222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154632127.

The product of its digits is 8640000, while the sum is 51.

The spelling of 685635552222 in words is "six hundred eighty-five billion, six hundred thirty-five million, five hundred fifty-two thousand, two hundred twenty-two".