163249338778 has 16 divisors (see below), whose sum is σ = 260419461120. Its totient is φ = 76531430016.

The previous prime is 163249338773. The next prime is 163249338821. The reversal of 163249338778 is 877833942361.

It is a happy number.

It is a super-2 number, since 2×163249338778² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163249338773) 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, 22140826 + ... + 22148197.

It is an arithmetic number, because the mean of its divisors is an integer number (16276216320).

Almost surely, 2^163249338778 is an apocalyptic number.

163249338778 is a deficient number, since it is larger than the sum of its proper divisors (97170122342).

163249338778 is a wasteful number, since it uses less digits than its factorization.

163249338778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44289141.

The product of its digits is 36578304, while the sum is 61.

The spelling of 163249338778 in words is "one hundred sixty-three billion, two hundred forty-nine million, three hundred thirty-eight thousand, seven hundred seventy-eight".