1222289561790 has 80 divisors (see below), whose sum is σ = 3585382740720. Its totient is φ = 296312618880.

The previous prime is 1222289561737. The next prime is 1222289561827. The reversal of 1222289561790 is 971659822221.

1222289561790 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 2 + 8 + 9 + 561 + 79 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 68581975 + ... + 68599794.

It is an arithmetic number, because the mean of its divisors is an integer number (44817284259).

Almost surely, 2^{1222289561790} is an apocalyptic number.

1222289561790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222289561790 is an abundant number, since it is smaller than the sum of its proper divisors (2363093178930).

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

1222289561790 is a wasteful number, since it uses less digits than its factorization.

1222289561790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137181799 (or 137181790 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1222289561790 in words is "one trillion, two hundred twenty-two billion, two hundred eighty-nine million, five hundred sixty-one thousand, seven hundred ninety".