645167807162 has 4 divisors (see below), whose sum is σ = 967751710746. Its totient is φ = 322583903580.

The previous prime is 645167807153. The next prime is 645167807197. The reversal of 645167807162 is 261708761546.

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., 457166651881 + 188001155281 = 676141^2 + 433591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161291951789 + ... + 161291951792.

Almost surely, 2^645167807162 is an apocalyptic number.

645167807162 is a deficient number, since it is larger than the sum of its proper divisors (322583903584).

645167807162 is a wasteful number, since it uses less digits than its factorization.

645167807162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322583903583.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 645167807162 in words is "six hundred forty-five billion, one hundred sixty-seven million, eight hundred seven thousand, one hundred sixty-two".