161202645 has 12 divisors (see below), whose sum is σ = 279417996. Its totient is φ = 85974720.

The previous prime is 161202641. The next prime is 161202647. The reversal of 161202645 is 546202161.

161202645 is a `hidden beast` number, since 1 + 6 + 12 + 0 + 2 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 123343236 + 37859409 = 11106^2 + 6153^2 .

It is not a de Polignac number, because 161202645 - 2² = 161202641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161202641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791096 + ... + 1791185.

It is an arithmetic number, because the mean of its divisors is an integer number (23284833).

Almost surely, 2^161202645 is an apocalyptic number.

161202645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161202645 is a deficient number, since it is larger than the sum of its proper divisors (118215351).

161202645 is a wasteful number, since it uses less digits than its factorization.

161202645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582292 (or 3582289 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 161202645 is about 12696.5603609797. The cubic root of 161202645 is about 544.2403298060.

The spelling of 161202645 in words is "one hundred sixty-one million, two hundred two thousand, six hundred forty-five".