645671227327 has 12 divisors (see below), whose sum is σ = 795268523520. Its totient is φ = 520877628096.

The previous prime is 645671227321. The next prime is 645671227337. The reversal of 645671227327 is 723722176546.

645671227327 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 645671227327 - 2²³ = 645662838719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645671227321) 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, 387556927 + ... + 387558592.

It is an arithmetic number, because the mean of its divisors is an integer number (66272376960).

Almost surely, 2^645671227327 is an apocalyptic number.

645671227327 is a deficient number, since it is larger than the sum of its proper divisors (149597296193).

645671227327 is a wasteful number, since it uses less digits than its factorization.

645671227327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775115550 (or 775115543 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 52.

The spelling of 645671227327 in words is "six hundred forty-five billion, six hundred seventy-one million, two hundred twenty-seven thousand, three hundred twenty-seven".