161370371066021 has 8 divisors (see below), whose sum is σ = 181339279860480. Its totient is φ = 142480862746992.

The previous prime is 161370371066011. The next prime is 161370371066053. The reversal of 161370371066021 is 120660173073161.

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 161370371066021 - 2¹⁴ = 161370371049637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161370371066011) 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, 269850118541 + ... + 269850119138.

It is an arithmetic number, because the mean of its divisors is an integer number (22667409982560).

Almost surely, 2^{161370371066021} is an apocalyptic number.

It is an amenable number.

161370371066021 is a deficient number, since it is larger than the sum of its proper divisors (19968908794459).

161370371066021 is a wasteful number, since it uses less digits than its factorization.

161370371066021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539700237715.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 161370371066021 in words is "one hundred sixty-one trillion, three hundred seventy billion, three hundred seventy-one million, sixty-six thousand, twenty-one".