164561436 has 48 divisors (see below), whose sum is σ = 459463200. Its totient is φ = 50633856.

The previous prime is 164561431. The next prime is 164561437. The reversal of 164561436 is 634165461.

It is a happy number.

164561436 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 614 + 36 = 666.

164561436 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 164561436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164561431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57201 + ... + 60008.

It is an arithmetic number, because the mean of its divisors is an integer number (9572150).

Almost surely, 2^164561436 is an apocalyptic number.

It is an amenable number.

164561436 is an abundant number, since it is smaller than the sum of its proper divisors (294901764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164561436 is a wasteful number, since it uses less digits than its factorization.

164561436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117235 (or 117227 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 164561436 is about 12828.1501394394. The cubic root of 164561436 is about 547.9942768507.

The spelling of 164561436 in words is "one hundred sixty-four million, five hundred sixty-one thousand, four hundred thirty-six".