1161511064 has 16 divisors (see below), whose sum is σ = 2488952400. Its totient is φ = 497790432.

The previous prime is 1161511051. The next prime is 1161511093. The reversal of 1161511064 is 4601151611.

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, 10370579 + ... + 10370690.

It is an arithmetic number, because the mean of its divisors is an integer number (155559525).

Almost surely, 2^1161511064 is an apocalyptic number.

1161511064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1161511064 is an abundant number, since it is smaller than the sum of its proper divisors (1327441336).

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

1161511064 is a wasteful number, since it uses less digits than its factorization.

1161511064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20741282 (or 20741278 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1161511064 is about 34080.9486957156. The cubic root of 1161511064 is about 1051.1736126013.

Adding to 1161511064 its reverse (4601151611), we get a palindrome (5762662675).

The spelling of 1161511064 in words is "one billion, one hundred sixty-one million, five hundred eleven thousand, sixty-four".