645313253101012 has 12 divisors (see below), whose sum is σ = 1129718162522740. Its totient is φ = 322536635237376.

The previous prime is 645313253100961. The next prime is 645313253101021. The reversal of 645313253101012 is 210101352313546.

It can be written as a sum of positive squares in 2 ways, for example, as 144892594933956 + 500420658167056 = 12037134^2 + 22370084^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29997816183 + ... + 29997837694.

Almost surely, 2^{645313253101012} is an apocalyptic number.

It is an amenable number.

645313253101012 is a deficient number, since it is larger than the sum of its proper divisors (484404909421728).

645313253101012 is a wasteful number, since it uses less digits than its factorization.

645313253101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59995656570 (or 59995656568 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 645313253101012 in words is "six hundred forty-five trillion, three hundred thirteen billion, two hundred fifty-three million, one hundred one thousand, twelve".