161168645 has 16 divisors (see below), whose sum is σ = 212604480. Its totient is φ = 116313600.

The previous prime is 161168639. The next prime is 161168647. The reversal of 161168645 is 546861161.

161168645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161168645 - 2¹⁰ = 161167621 is a prime.

It is a super-2 number, since 2×161168645² = 51950664262272050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161168599 and 161168608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161168647) 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, 3980 + ... + 18389.

It is an arithmetic number, because the mean of its divisors is an integer number (13287780).

Almost surely, 2^161168645 is an apocalyptic number.

It is an amenable number.

161168645 is a deficient number, since it is larger than the sum of its proper divisors (51435835).

161168645 is a wasteful number, since it uses less digits than its factorization.

161168645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22516.

The product of its digits is 34560, while the sum is 38.

The square root of 161168645 is about 12695.2213450574. The cubic root of 161168645 is about 544.2020643621.

The spelling of 161168645 in words is "one hundred sixty-one million, one hundred sixty-eight thousand, six hundred forty-five".