164781223075 has 48 divisors (see below), whose sum is σ = 242786682880. Its totient is φ = 108560736000.

The previous prime is 164781223063. The next prime is 164781223099. The reversal of 164781223075 is 570322187461.

It is a de Polignac number, because none of the positive numbers 2^k-164781223075 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644815 + ... + 863335.

Almost surely, 2^164781223075 is an apocalyptic number.

164781223075 is a deficient number, since it is larger than the sum of its proper divisors (78005459805).

164781223075 is a wasteful number, since it uses less digits than its factorization.

164781223075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218708 (or 218703 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 164781223075 in words is "one hundred sixty-four billion, seven hundred eighty-one million, two hundred twenty-three thousand, seventy-five".