645274372226 has 32 divisors (see below), whose sum is σ = 1099296914688. Its totient is φ = 281469997440.

The previous prime is 645274372157. The next prime is 645274372279. The reversal of 645274372226 is 622273472546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5370170 + ... + 5489013.

It is an arithmetic number, because the mean of its divisors is an integer number (34353028584).

Almost surely, 2^645274372226 is an apocalyptic number.

645274372226 is a deficient number, since it is larger than the sum of its proper divisors (454022542462).

645274372226 is a wasteful number, since it uses less digits than its factorization.

645274372226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10859306.

The product of its digits is 6773760, while the sum is 50.

The spelling of 645274372226 in words is "six hundred forty-five billion, two hundred seventy-four million, three hundred seventy-two thousand, two hundred twenty-six".