161042644265 has 8 divisors (see below), whose sum is σ = 193777745280. Its totient is φ = 128483067312.

The previous prime is 161042644249. The next prime is 161042644267. The reversal of 161042644265 is 562446240161.

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 161042644265 - 2⁴ = 161042644249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161042644267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43878995 + ... + 43882664.

It is an arithmetic number, because the mean of its divisors is an integer number (24222218160).

Almost surely, 2^161042644265 is an apocalyptic number.

It is an amenable number.

161042644265 is a deficient number, since it is larger than the sum of its proper divisors (32735101015).

161042644265 is an equidigital number, since it uses as much as digits as its factorization.

161042644265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87762031.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 161042644265 in words is "one hundred sixty-one billion, forty-two million, six hundred forty-four thousand, two hundred sixty-five".