645021225112 has 32 divisors (see below), whose sum is σ = 1321800440400. Its totient is φ = 292649500800.

The previous prime is 645021225011. The next prime is 645021225131. The reversal of 645021225112 is 211522120546.

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, 6726687 + ... + 6821902.

Almost surely, 2^645021225112 is an apocalyptic number.

It is an amenable number.

645021225112 is an abundant number, since it is smaller than the sum of its proper divisors (676779215288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645021225112 is a wasteful number, since it uses less digits than its factorization.

645021225112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13549147 (or 13549143 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 645021225112 its reverse (211522120546), we get a palindrome (856543345658).

The spelling of 645021225112 in words is "six hundred forty-five billion, twenty-one million, two hundred twenty-five thousand, one hundred twelve".