645227552162 has 6 divisors (see below), whose sum is σ = 967843032219. Its totient is φ = 322613208090.

The previous prime is 645227552161. The next prime is 645227552171. The reversal of 645227552162 is 261255722546.

645227552162 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 only one way, i.e., 322613776081 + 322613776081 = 567991^2 + 567991^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=567991.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645227552161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 851987 + ... + 1419977.

Almost surely, 2^645227552162 is an apocalyptic number.

645227552162 is a deficient number, since it is larger than the sum of its proper divisors (322615480057).

645227552162 is an frugal number, since it uses more digits than its factorization.

645227552162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135984 (or 567993 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 47.

The spelling of 645227552162 in words is "six hundred forty-five billion, two hundred twenty-seven million, five hundred fifty-two thousand, one hundred sixty-two".