2161653161 has 8 divisors (see below), whose sum is σ = 2281281600. Its totient is φ = 2042610480.

The previous prime is 2161653113. The next prime is 2161653167. The reversal of 2161653161 is 1613561612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161653161 - 2²⁶ = 2094544297 is a prime.

It is a super-2 number, since 2×2161653161² = 9345488776922583842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161653167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138845 + ... + 153626.

It is an arithmetic number, because the mean of its divisors is an integer number (285160200).

Almost surely, 2^2161653161 is an apocalyptic number.

It is an amenable number.

2161653161 is a deficient number, since it is larger than the sum of its proper divisors (119628439).

2161653161 is a wasteful number, since it uses less digits than its factorization.

2161653161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292879.

The product of its digits is 6480, while the sum is 32.

The square root of 2161653161 is about 46493.5819334239. The cubic root of 2161653161 is about 1292.9905102376.

The spelling of 2161653161 in words is "two billion, one hundred sixty-one million, six hundred fifty-three thousand, one hundred sixty-one".