164393765 has 16 divisors (see below), whose sum is σ = 209347200. Its totient is φ = 123659712.

The previous prime is 164393759. The next prime is 164393783. The reversal of 164393765 is 567393461.

It is a happy number.

164393765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 164393765 - 2¹² = 164389669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5330 + ... + 18899.

It is an arithmetic number, because the mean of its divisors is an integer number (13084200).

Almost surely, 2^164393765 is an apocalyptic number.

It is an amenable number.

164393765 is a deficient number, since it is larger than the sum of its proper divisors (44953435).

164393765 is a wasteful number, since it uses less digits than its factorization.

164393765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24316.

The product of its digits is 408240, while the sum is 44.

The square root of 164393765 is about 12821.6131980340. The cubic root of 164393765 is about 547.8080971993.

The spelling of 164393765 in words is "one hundred sixty-four million, three hundred ninety-three thousand, seven hundred sixty-five".