161161113 has 8 divisors (see below), whose sum is σ = 216968128. Its totient is φ = 106397424.

The previous prime is 161161103. The next prime is 161161123. The reversal of 161161113 is 311161161.

It is an interprime number because it is at equal distance from previous prime (161161103) and next prime (161161123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161161113 - 2⁵ = 161161081 is a prime.

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 161161113.

It is not an unprimeable number, because it can be changed into a prime (161161103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260470 + ... + 261087.

It is an arithmetic number, because the mean of its divisors is an integer number (27121016).

Almost surely, 2^161161113 is an apocalyptic number.

It is an amenable number.

161161113 is a deficient number, since it is larger than the sum of its proper divisors (55807015).

161161113 is a wasteful number, since it uses less digits than its factorization.

161161113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521663.

The product of its digits is 108, while the sum is 21.

The square root of 161161113 is about 12694.9246945384. The cubic root of 161161113 is about 544.1935867127.

The spelling of 161161113 in words is "one hundred sixty-one million, one hundred sixty-one thousand, one hundred thirteen".