645344335300311 has 12 divisors (see below), whose sum is σ = 932164300407600. Its totient is φ = 430229436622560.

The previous prime is 645344335300279. The next prime is 645344335300387. The reversal of 645344335300311 is 113003533443546.

645344335300311 is a `hidden beast` number, since 6 + 4 + 5 + 3 + 4 + 4 + 335 + 300 + 3 + 1 + 1 = 666.

It is not a de Polignac number, because 645344335300311 - 2⁵ = 645344335300279 is a prime.

It is a super-2 number, since 2×645344335300311² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645344335307311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34276915 + ... + 49654763.

It is an arithmetic number, because the mean of its divisors is an integer number (77680358367300).

Almost surely, 2^{645344335300311} is an apocalyptic number.

645344335300311 is a deficient number, since it is larger than the sum of its proper divisors (286819965107289).

645344335300311 is a wasteful number, since it uses less digits than its factorization.

645344335300311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20040726 (or 20040723 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 45.

Adding to 645344335300311 its reverse (113003533443546), we get a palindrome (758347868743857).

The spelling of 645344335300311 in words is "six hundred forty-five trillion, three hundred forty-four billion, three hundred thirty-five million, three hundred thousand, three hundred eleven".