645959595459 has 16 divisors (see below), whose sum is σ = 870094622880. Its totient is φ = 426234969600.

The previous prime is 645959595443. The next prime is 645959595473. The reversal of 645959595459 is 954595959546.

It is not a de Polignac number, because 645959595459 - 2⁴ = 645959595443 is a prime.

It is a super-3 number, since 3×645959595459³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (645959595499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569227 + ... + 1271195.

It is an arithmetic number, because the mean of its divisors is an integer number (54380913930).

Almost surely, 2^645959595459 is an apocalyptic number.

645959595459 is a deficient number, since it is larger than the sum of its proper divisors (224135027421).

645959595459 is a wasteful number, since it uses less digits than its factorization.

645959595459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705110.

The product of its digits is 1968300000, while the sum is 75.

The spelling of 645959595459 in words is "six hundred forty-five billion, nine hundred fifty-nine million, five hundred ninety-five thousand, four hundred fifty-nine".