645224545422546 has 32 divisors (see below), whose sum is σ = 1291557984748416. Its totient is φ = 214890111600000.

The previous prime is 645224545422487. The next prime is 645224545422593.

645224545422546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645224545422546² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645224545422546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22925446 + ... + 42614846.

It is an arithmetic number, because the mean of its divisors is an integer number (40361187023388).

Almost surely, 2^{645224545422546} is an apocalyptic number.

645224545422546 is an abundant number, since it is smaller than the sum of its proper divisors (646333439325870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645224545422546 is a wasteful number, since it uses less digits than its factorization.

645224545422546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19694098.

The product of its digits is 368640000, while the sum is 60.

The spelling of 645224545422546 in words is "six hundred forty-five trillion, two hundred twenty-four billion, five hundred forty-five million, four hundred twenty-two thousand, five hundred forty-six".