645250243112 has 16 divisors (see below), whose sum is σ = 1209862700340. Its totient is φ = 322620189696.

The previous prime is 645250243111. The next prime is 645250243123. The reversal of 645250243112 is 211342052546.

645250243112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 645024221956 + 226021156 = 803134^2 + 15034^2 .

It is not an unprimeable number, because it can be changed into a prime (645250243111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27323 + ... + 1136330.

Almost surely, 2^645250243112 is an apocalyptic number.

It is an amenable number.

645250243112 is a deficient number, since it is larger than the sum of its proper divisors (564612457228).

645250243112 is a wasteful number, since it uses less digits than its factorization.

645250243112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232972 (or 1232968 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 645250243112 its reverse (211342052546), we get a palindrome (856592295658).

The spelling of 645250243112 in words is "six hundred forty-five billion, two hundred fifty million, two hundred forty-three thousand, one hundred twelve".