161818495 has 8 divisors (see below), whose sum is σ = 205604784. Its totient is φ = 121839744.

The previous prime is 161818493. The next prime is 161818523. The reversal of 161818495 is 594818161.

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 161818495 - 2¹ = 161818493 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 (161818493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951789 + ... + 951958.

It is an arithmetic number, because the mean of its divisors is an integer number (25700598).

Almost surely, 2^161818495 is an apocalyptic number.

161818495 is a deficient number, since it is larger than the sum of its proper divisors (43786289).

161818495 is a wasteful number, since it uses less digits than its factorization.

161818495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903769.

The product of its digits is 69120, while the sum is 43.

The square root of 161818495 is about 12720.7898732744. The cubic root of 161818495 is about 544.9325113524.

The spelling of 161818495 in words is "one hundred sixty-one million, eight hundred eighteen thousand, four hundred ninety-five".