1643442531122 has 64 divisors (see below), whose sum is σ = 3069777553920. Its totient is φ = 643700929536.

The previous prime is 1643442531097. The next prime is 1643442531223. The reversal of 1643442531122 is 2211352443461.

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, 4243904 + ... + 4614932.

It is an arithmetic number, because the mean of its divisors is an integer number (47965274280).

Almost surely, 2^{1643442531122} is an apocalyptic number.

1643442531122 is a deficient number, since it is larger than the sum of its proper divisors (1426335022798).

1643442531122 is a wasteful number, since it uses less digits than its factorization.

1643442531122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371595.

The product of its digits is 138240, while the sum is 38.

Adding to 1643442531122 its reverse (2211352443461), we get a palindrome (3854794974583).

The spelling of 1643442531122 in words is "one trillion, six hundred forty-three billion, four hundred forty-two million, five hundred thirty-one thousand, one hundred twenty-two".