1643216374326 has 8 divisors (see below), whose sum is σ = 3286432748664. Its totient is φ = 547738791440.

The previous prime is 1643216374279. The next prime is 1643216374361. The reversal of 1643216374326 is 6234736123461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1643216374326 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136934697855 + ... + 136934697866.

It is an arithmetic number, because the mean of its divisors is an integer number (410804093583).

Almost surely, 2^{1643216374326} is an apocalyptic number.

1643216374326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1643216374326 is a wasteful number, since it uses less digits than its factorization.

1643216374326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273869395726.

The product of its digits is 2612736, while the sum is 48.

The spelling of 1643216374326 in words is "one trillion, six hundred forty-three billion, two hundred sixteen million, three hundred seventy-four thousand, three hundred twenty-six".