161116635 has 16 divisors (see below), whose sum is σ = 257986080. Its totient is φ = 85862400.

The previous prime is 161116619. The next prime is 161116639. The reversal of 161116635 is 536611161.

It is not a de Polignac number, because 161116635 - 2⁴ = 161116619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161116639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20661 + ... + 27369.

It is an arithmetic number, because the mean of its divisors is an integer number (16124130).

Almost surely, 2^161116635 is an apocalyptic number.

161116635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161116635 is a deficient number, since it is larger than the sum of its proper divisors (96869445).

161116635 is a wasteful number, since it uses less digits than its factorization.

161116635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8318.

The product of its digits is 3240, while the sum is 30.

The square root of 161116635 is about 12693.1727712184. The cubic root of 161116635 is about 544.1435190734.

Adding to 161116635 its reverse (536611161), we get a palindrome (697727796).

The spelling of 161116635 in words is "one hundred sixty-one million, one hundred sixteen thousand, six hundred thirty-five".