645226622546 has 48 divisors (see below), whose sum is σ = 1072535368632. Its totient is φ = 290892349440.

The previous prime is 645226622489. The next prime is 645226622567.

645226622546 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 282852721921 + 362373900625 = 531839^2 + 601975^2 .

It is a junction number, because it is equal to n+sod(n) for n = 645226622494 and 645226622503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15719426 + ... + 15760418.

Almost surely, 2^645226622546 is an apocalyptic number.

645226622546 is a deficient number, since it is larger than the sum of its proper divisors (427308746086).

645226622546 is a wasteful number, since it uses less digits than its factorization.

645226622546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41547 (or 41536 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 50.

The spelling of 645226622546 in words is "six hundred forty-five billion, two hundred twenty-six million, six hundred twenty-two thousand, five hundred forty-six".