161818526423202 has 96 divisors (see below), whose sum is σ = 359879339667456. Its totient is φ = 48106223630400.

The previous prime is 161818526423179. The next prime is 161818526423219. The reversal of 161818526423202 is 202324625818161.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2355025627 + ... + 2355094337.

It is an arithmetic number, because the mean of its divisors is an integer number (3748743121536).

Almost surely, 2^{161818526423202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161818526423202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179939669833728).

161818526423202 is an abundant number, since it is smaller than the sum of its proper divisors (198060813244254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161818526423202 is a wasteful number, since it uses less digits than its factorization.

161818526423202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81536 (or 81483 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 161818526423202 in words is "one hundred sixty-one trillion, eight hundred eighteen billion, five hundred twenty-six million, four hundred twenty-three thousand, two hundred two".