645002644323 has 16 divisors (see below), whose sum is σ = 910626471936. Its totient is φ = 404692206720.

The previous prime is 645002644249. The next prime is 645002644417. The reversal of 645002644323 is 323446200546.

645002644323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645002644323 - 2¹⁴ = 645002627939 is a prime.

It is a super-2 number, since 2×645002644323² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645002643323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203990 + ... + 1655172.

It is an arithmetic number, because the mean of its divisors is an integer number (56914154496).

Almost surely, 2^645002644323 is an apocalyptic number.

645002644323 is a deficient number, since it is larger than the sum of its proper divisors (265623827613).

645002644323 is a wasteful number, since it uses less digits than its factorization.

645002644323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479234.

The product of its (nonzero) digits is 414720, while the sum is 39.

Adding to 645002644323 its reverse (323446200546), we get a palindrome (968448844869).

The spelling of 645002644323 in words is "six hundred forty-five billion, two million, six hundred forty-four thousand, three hundred twenty-three".