161103378222 has 32 divisors (see below), whose sum is σ = 358214297760. Its totient is φ = 53670107520.

The previous prime is 161103378131. The next prime is 161103378257. The reversal of 161103378222 is 222873301161.

161103378222 is a `hidden beast` number, since 1 + 61 + 1 + 0 + 3 + 378 + 222 = 666.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 767179 + ... + 954342.

It is an arithmetic number, because the mean of its divisors is an integer number (11194196805).

Almost surely, 2^161103378222 is an apocalyptic number.

161103378222 is an abundant number, since it is smaller than the sum of its proper divisors (197110919538).

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

161103378222 is a wasteful number, since it uses less digits than its factorization.

161103378222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723265 (or 1723259 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Adding to 161103378222 its reverse (222873301161), we get a palindrome (383976679383).

The spelling of 161103378222 in words is "one hundred sixty-one billion, one hundred three million, three hundred seventy-eight thousand, two hundred twenty-two".