1115161566 has 32 divisors (see below), whose sum is σ = 2362151040. Its totient is φ = 349989984.

The previous prime is 1115161513. The next prime is 1115161577. The reversal of 1115161566 is 6651615111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11425 + ... + 48588.

It is an arithmetic number, because the mean of its divisors is an integer number (73817220).

Almost surely, 2^1115161566 is an apocalyptic number.

1115161566 is an abundant number, since it is smaller than the sum of its proper divisors (1246989474).

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

1115161566 is a wasteful number, since it uses less digits than its factorization.

1115161566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60200.

The product of its digits is 5400, while the sum is 33.

The square root of 1115161566 is about 33394.0348864883. The cubic root of 1115161566 is about 1037.0012129156.

Adding to 1115161566 its reverse (6651615111), we get a palindrome (7766776677).

The spelling of 1115161566 in words is "one billion, one hundred fifteen million, one hundred sixty-one thousand, five hundred sixty-six".