645611026222 has 16 divisors (see below), whose sum is σ = 982903040640. Its totient is φ = 317976998328.

The previous prime is 645611026189. The next prime is 645611026261. The reversal of 645611026222 is 222620116546.

It is a happy number.

It is a super-4 number, since 4×645611026222⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5370093 + ... + 5488999.

It is an arithmetic number, because the mean of its divisors is an integer number (61431440040).

Almost surely, 2^645611026222 is an apocalyptic number.

645611026222 is a deficient number, since it is larger than the sum of its proper divisors (337292014418).

645611026222 is a wasteful number, since it uses less digits than its factorization.

645611026222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159495.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 645611026222 in words is "six hundred forty-five billion, six hundred eleven million, twenty-six thousand, two hundred twenty-two".