1164564161 has 4 divisors (see below), whose sum is σ = 1165511424. Its totient is φ = 1163616900.

The previous prime is 1164564151. The next prime is 1164564173. The reversal of 1164564161 is 1614654611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1614654611 = 17 ⋅94979683.

It is a cyclic number.

It is not a de Polignac number, because 1164564161 - 2⁶ = 1164564097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164564151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471785 + ... + 474246.

It is an arithmetic number, because the mean of its divisors is an integer number (291377856).

Almost surely, 2^1164564161 is an apocalyptic number.

It is an amenable number.

1164564161 is a deficient number, since it is larger than the sum of its proper divisors (947263).

1164564161 is an equidigital number, since it uses as much as digits as its factorization.

1164564161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947262.

The product of its digits is 17280, while the sum is 35.

The square root of 1164564161 is about 34125.7111427733. The cubic root of 1164564161 is about 1052.0938297304.

The spelling of 1164564161 in words is "one billion, one hundred sixty-four million, five hundred sixty-four thousand, one hundred sixty-one".