1643321473115 has 16 divisors (see below), whose sum is σ = 2261834127552. Its totient is φ = 1122780956544.

The previous prime is 1643321473111. The next prime is 1643321473121. The reversal of 1643321473115 is 5113741233461.

It is a cyclic number.

It is not a de Polignac number, because 1643321473115 - 2² = 1643321473111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1643321473111) 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, 84741284 + ... + 84760673.

It is an arithmetic number, because the mean of its divisors is an integer number (141364632972).

Almost surely, 2^{1643321473115} is an apocalyptic number.

1643321473115 is a deficient number, since it is larger than the sum of its proper divisors (618512654437).

1643321473115 is a wasteful number, since it uses less digits than its factorization.

1643321473115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169502246.

The product of its digits is 181440, while the sum is 41.

The spelling of 1643321473115 in words is "one trillion, six hundred forty-three billion, three hundred twenty-one million, four hundred seventy-three thousand, one hundred fifteen".