645453422116 has 6 divisors (see below), whose sum is σ = 1129543488710. Its totient is φ = 322726711056.

The previous prime is 645453422083. The next prime is 645453422167. The reversal of 645453422116 is 611224354546.

It can be written as a sum of positive squares in only one way, i.e., 643932422116 + 1521000000 = 802454^2 + 39000^2 .

It is a super-2 number, since 2×645453422116² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80681677761 + ... + 80681677768.

Almost surely, 2^645453422116 is an apocalyptic number.

It is an amenable number.

645453422116 is a deficient number, since it is larger than the sum of its proper divisors (484090066594).

645453422116 is a wasteful number, since it uses less digits than its factorization.

645453422116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161363355533 (or 161363355531 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 645453422116 in words is "six hundred forty-five billion, four hundred fifty-three million, four hundred twenty-two thousand, one hundred sixteen".