1161326567 has 4 divisors (see below), whose sum is σ = 1161426216. Its totient is φ = 1161226920.

The previous prime is 1161326563. The next prime is 1161326591. The reversal of 1161326567 is 7656231611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7656231611 = 7 ⋅1093747373.

It is a cyclic number.

It is not a de Polignac number, because 1161326567 - 2² = 1161326563 is a prime.

It is a super-4 number, since 4×1161326567⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161326567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161326563) 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, 29609 + ... + 56562.

It is an arithmetic number, because the mean of its divisors is an integer number (290356554).

Almost surely, 2^1161326567 is an apocalyptic number.

1161326567 is a deficient number, since it is larger than the sum of its proper divisors (99649).

1161326567 is an equidigital number, since it uses as much as digits as its factorization.

1161326567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99648.

The product of its digits is 45360, while the sum is 38.

The square root of 1161326567 is about 34078.2418413861. The cubic root of 1161326567 is about 1051.1179527362.

The spelling of 1161326567 in words is "one billion, one hundred sixty-one million, three hundred twenty-six thousand, five hundred sixty-seven".