168100644883899 has 32 divisors (see below), whose sum is σ = 275858470128640. Its totient is φ = 88668150083712.

The previous prime is 168100644883879. The next prime is 168100644883901. The reversal of 168100644883899 is 998388446001861.

It is not a de Polignac number, because 168100644883899 - 2⁷ = 168100644883771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168100644883899.

It is not an unprimeable number, because it can be changed into a prime (168100644883859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86869554 + ... + 88783560.

It is an arithmetic number, because the mean of its divisors is an integer number (8620577191520).

Almost surely, 2^{168100644883899} is an apocalyptic number.

168100644883899 is a deficient number, since it is larger than the sum of its proper divisors (107757825244741).

168100644883899 is a wasteful number, since it uses less digits than its factorization.

168100644883899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235739.

The product of its (nonzero) digits is 573308928, while the sum is 75.

The spelling of 168100644883899 in words is "one hundred sixty-eight trillion, one hundred billion, six hundred forty-four million, eight hundred eighty-three thousand, eight hundred ninety-nine".