1643604271115 has 8 divisors (see below), whose sum is σ = 1991853097488. Its totient is φ = 1301864768800.

The previous prime is 1643604271027. The next prime is 1643604271117. The reversal of 1643604271115 is 5111724063461.

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

It is not a de Polignac number, because 1643604271115 - 2³⁰ = 1642530529291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1643604271117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627330457 + ... + 1627331466.

It is an arithmetic number, because the mean of its divisors is an integer number (248981637186).

Almost surely, 2^{1643604271115} is an apocalyptic number.

1643604271115 is a deficient number, since it is larger than the sum of its proper divisors (348248826373).

1643604271115 is a wasteful number, since it uses less digits than its factorization.

1643604271115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254662029.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 1643604271115 in words is "one trillion, six hundred forty-three billion, six hundred four million, two hundred seventy-one thousand, one hundred fifteen".