161165716023 has 16 divisors (see below), whose sum is σ = 231430068576. Its totient is φ = 99173489280.

The previous prime is 161165716021. The next prime is 161165716067. The reversal of 161165716023 is 320617561161.

161165716023 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 161165716023 - 2¹ = 161165716021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161165716021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681853 + ... + 887273.

It is an arithmetic number, because the mean of its divisors is an integer number (14464379286).

Almost surely, 2^161165716023 is an apocalyptic number.

161165716023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161165716023 is a deficient number, since it is larger than the sum of its proper divisors (70264352553).

161165716023 is a wasteful number, since it uses less digits than its factorization.

161165716023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225554.

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 161165716023 in words is "one hundred sixty-one billion, one hundred sixty-five million, seven hundred sixteen thousand, twenty-three".