1222312553646 has 16 divisors (see below), whose sum is σ = 2460195969744. Its totient is φ = 404842374144.

The previous prime is 1222312553641. The next prime is 1222312553687. The reversal of 1222312553646 is 6463552132221.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222312553598 and 1222312553607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222312553641) 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, 648784915 + ... + 648786798.

It is an arithmetic number, because the mean of its divisors is an integer number (153762248109).

Almost surely, 2^{1222312553646} is an apocalyptic number.

1222312553646 is an abundant number, since it is smaller than the sum of its proper divisors (1237883416098).

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

1222312553646 is a wasteful number, since it uses less digits than its factorization.

1222312553646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297571875.

The product of its digits is 518400, while the sum is 42.

Adding to 1222312553646 its reverse (6463552132221), we get a palindrome (7685864685867).

The spelling of 1222312553646 in words is "one trillion, two hundred twenty-two billion, three hundred twelve million, five hundred fifty-three thousand, six hundred forty-six".