164347561645 has 16 divisors (see below), whose sum is σ = 198118327680. Its totient is φ = 130878564544.

The previous prime is 164347561621. The next prime is 164347561661. The reversal of 164347561645 is 546165743461.

It is a cyclic number.

It is not a de Polignac number, because 164347561645 - 2¹⁹ = 164347037357 is a prime.

It is a super-3 number, since 3×164347561645³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164347561592 and 164347561601.

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, 894342 + ... + 1062328.

It is an arithmetic number, because the mean of its divisors is an integer number (12382395480).

Almost surely, 2^164347561645 is an apocalyptic number.

It is an amenable number.

164347561645 is a deficient number, since it is larger than the sum of its proper divisors (33770766035).

164347561645 is a wasteful number, since it uses less digits than its factorization.

164347561645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168884.

The product of its digits is 7257600, while the sum is 52.

The spelling of 164347561645 in words is "one hundred sixty-four billion, three hundred forty-seven million, five hundred sixty-one thousand, six hundred forty-five".