1643216374327 has 16 divisors (see below), whose sum is σ = 1947816299520. Its totient is φ = 1369558324800.

The previous prime is 1643216374279. The next prime is 1643216374361. The reversal of 1643216374327 is 7234736123461.

It is a happy number.

It is not a de Polignac number, because 1643216374327 - 2⁷ = 1643216374199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643216374927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126804478 + ... + 126817435.

It is an arithmetic number, because the mean of its divisors is an integer number (121738518720).

Almost surely, 2^{1643216374327} is an apocalyptic number.

1643216374327 is a deficient number, since it is larger than the sum of its proper divisors (304599925193).

1643216374327 is a wasteful number, since it uses less digits than its factorization.

1643216374327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253621974.

The product of its digits is 3048192, while the sum is 49.

The spelling of 1643216374327 in words is "one trillion, six hundred forty-three billion, two hundred sixteen million, three hundred seventy-four thousand, three hundred twenty-seven".