161326442454365 has 16 divisors (see below), whose sum is σ = 204815189589120. Its totient is φ = 121647809545920.

The previous prime is 161326442454311. The next prime is 161326442454377. The reversal of 161326442454365 is 563454244623161.

It is not a de Polignac number, because 161326442454365 - 2¹² = 161326442450269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161326442454365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4310065241 + ... + 4310102670.

It is an arithmetic number, because the mean of its divisors is an integer number (12800949349320).

Almost surely, 2^{161326442454365} is an apocalyptic number.

It is an amenable number.

161326442454365 is a deficient number, since it is larger than the sum of its proper divisors (43488747134755).

161326442454365 is a wasteful number, since it uses less digits than its factorization.

161326442454365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8620168132.

The product of its digits is 49766400, while the sum is 56.

The spelling of 161326442454365 in words is "one hundred sixty-one trillion, three hundred twenty-six billion, four hundred forty-two million, four hundred fifty-four thousand, three hundred sixty-five".