1645315795199 has 4 divisors (see below), whose sum is σ = 1645345607880. Its totient is φ = 1645285982520.

The previous prime is 1645315795169. The next prime is 1645315795223. The reversal of 1645315795199 is 9915975135461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1645315795199 - 2³² = 1641020827903 is a prime.

It is a super-2 number, since 2×1645315795199² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645315795169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14823404 + ... + 14933985.

It is an arithmetic number, because the mean of its divisors is an integer number (411336401970).

Almost surely, 2^{1645315795199} is an apocalyptic number.

1645315795199 is a deficient number, since it is larger than the sum of its proper divisors (29812681).

1645315795199 is an equidigital number, since it uses as much as digits as its factorization.

1645315795199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29812680.

The product of its digits is 45927000, while the sum is 65.

The spelling of 1645315795199 in words is "one trillion, six hundred forty-five billion, three hundred fifteen million, seven hundred ninety-five thousand, one hundred ninety-nine".