645133060522 has 4 divisors (see below), whose sum is σ = 967699590786. Its totient is φ = 322566530260.

The previous prime is 645133060519. The next prime is 645133060543. The reversal of 645133060522 is 225060331546.

645133060522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 645035465881 + 97594641 = 803141^2 + 9879^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161283265129 + ... + 161283265132.

Almost surely, 2^645133060522 is an apocalyptic number.

645133060522 is a deficient number, since it is larger than the sum of its proper divisors (322566530264).

645133060522 is a wasteful number, since it uses less digits than its factorization.

645133060522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322566530263.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 645133060522 in words is "six hundred forty-five billion, one hundred thirty-three million, sixty thousand, five hundred twenty-two".