168342053818 has 16 divisors (see below), whose sum is σ = 267466366440. Its totient is φ = 79190286336.

The previous prime is 168342053777. The next prime is 168342053819. The reversal of 168342053818 is 818350243861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59815952329 + 108526101489 = 244573^2 + 329433^2 .

It is not an unprimeable number, because it can be changed into a prime (168342053819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829221 + ... + 1012072.

Almost surely, 2^168342053818 is an apocalyptic number.

168342053818 is a deficient number, since it is larger than the sum of its proper divisors (99124312622).

168342053818 is a wasteful number, since it uses less digits than its factorization.

168342053818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844001.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 168342053818 in words is "one hundred sixty-eight billion, three hundred forty-two million, fifty-three thousand, eight hundred eighteen".