1151564165 has 4 divisors (see below), whose sum is σ = 1381877004. Its totient is φ = 921251328.

The previous prime is 1151564153. The next prime is 1151564177. The reversal of 1151564165 is 5614651511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1151564153) and next prime (1151564177).

It can be written as a sum of positive squares in 2 ways, for example, as 249703204 + 901860961 = 15802^2 + 30031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151564165 - 2⁴ = 1151564149 is a prime.

It is a super-2 number, since 2×1151564165² = 2652200052224294450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115156412 + ... + 115156421.

It is an arithmetic number, because the mean of its divisors is an integer number (345469251).

Almost surely, 2^1151564165 is an apocalyptic number.

It is an amenable number.

1151564165 is a deficient number, since it is larger than the sum of its proper divisors (230312839).

1151564165 is an equidigital number, since it uses as much as digits as its factorization.

1151564165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230312838.

The product of its digits is 18000, while the sum is 35.

The square root of 1151564165 is about 33934.7044336620. The cubic root of 1151564165 is about 1048.1643406813.

The spelling of 1151564165 in words is "one billion, one hundred fifty-one million, five hundred sixty-four thousand, one hundred sixty-five".