645730734367199 has 32 divisors (see below), whose sum is σ = 742610837928960. Its totient is φ = 556810617420288.

The previous prime is 645730734367189. The next prime is 645730734367307. The reversal of 645730734367199 is 991763437037546.

It is a cyclic number.

It is not a de Polignac number, because 645730734367199 - 2⁸ = 645730734366943 is a prime.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645730734367189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93863927 + ... + 100508199.

It is an arithmetic number, because the mean of its divisors is an integer number (23206588685280).

Almost surely, 2^{645730734367199} is an apocalyptic number.

645730734367199 is a deficient number, since it is larger than the sum of its proper divisors (96880103561761).

645730734367199 is a wasteful number, since it uses less digits than its factorization.

645730734367199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6651911.

The product of its (nonzero) digits is 2160406080, while the sum is 74.

The spelling of 645730734367199 in words is "six hundred forty-five trillion, seven hundred thirty billion, seven hundred thirty-four million, three hundred sixty-seven thousand, one hundred ninety-nine".