1643842422 has 12 divisors (see below), whose sum is σ = 3561658620. Its totient is φ = 547947468.

The previous prime is 1643842411. The next prime is 1643842427. The reversal of 1643842422 is 2242483461.

1643842422 is a `hidden beast` number, since 1 + 643 + 8 + 4 + 2 + 4 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643842427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45662272 + ... + 45662307.

It is an arithmetic number, because the mean of its divisors is an integer number (296804885).

Almost surely, 2^1643842422 is an apocalyptic number.

1643842422 is an abundant number, since it is smaller than the sum of its proper divisors (1917816198).

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

1643842422 is a wasteful number, since it uses less digits than its factorization.

1643842422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91324587 (or 91324584 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 1643842422 is about 40544.3266314783. The cubic root of 1643842422 is about 1180.1939789309.

The spelling of 1643842422 in words is "one billion, six hundred forty-three million, eight hundred forty-two thousand, four hundred twenty-two".