655661123222 has 64 divisors (see below), whose sum is σ = 1199838044160. Its totient is φ = 262309764096.

The previous prime is 655661123209. The next prime is 655661123261. The reversal of 655661123222 is 222321166556.

It is a super-2 number, since 2×655661123222² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 655661123222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35951018 + ... + 35969250.

It is an arithmetic number, because the mean of its divisors is an integer number (18747469440).

Almost surely, 2^655661123222 is an apocalyptic number.

655661123222 is a deficient number, since it is larger than the sum of its proper divisors (544176920938).

655661123222 is a wasteful number, since it uses less digits than its factorization.

655661123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19485.

The product of its digits is 259200, while the sum is 41.

Adding to 655661123222 its reverse (222321166556), we get a palindrome (877982289778).

The spelling of 655661123222 in words is "six hundred fifty-five billion, six hundred sixty-one million, one hundred twenty-three thousand, two hundred twenty-two".