645064405022 has 8 divisors (see below), whose sum is σ = 967600821000. Its totient is φ = 322530798024.

The previous prime is 645064405019. The next prime is 645064405043. The reversal of 645064405022 is 220504460546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645064405022² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20729 + ... + 1136027.

It is an arithmetic number, because the mean of its divisors is an integer number (120950102625).

Almost surely, 2^645064405022 is an apocalyptic number.

645064405022 is a deficient number, since it is larger than the sum of its proper divisors (322536415978).

645064405022 is a wasteful number, since it uses less digits than its factorization.

645064405022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404490.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 645064405022 its reverse (220504460546), we get a palindrome (865568865568).

The spelling of 645064405022 in words is "six hundred forty-five billion, sixty-four million, four hundred five thousand, twenty-two".