168211439801999 has 16 divisors (see below), whose sum is σ = 189876087792000. Its totient is φ = 147611408068320.

The previous prime is 168211439801957. The next prime is 168211439802037. The reversal of 168211439801999 is 999108934112861.

It is not a de Polignac number, because 168211439801999 - 2¹⁶ = 168211439736463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168211439801939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61146269 + ... + 63837990.

It is an arithmetic number, because the mean of its divisors is an integer number (11867255487000).

Almost surely, 2^{168211439801999} is an apocalyptic number.

168211439801999 is a deficient number, since it is larger than the sum of its proper divisors (21664647990001).

168211439801999 is a wasteful number, since it uses less digits than its factorization.

168211439801999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124988518.

The product of its (nonzero) digits is 60466176, while the sum is 71.

The spelling of 168211439801999 in words is "one hundred sixty-eight trillion, two hundred eleven billion, four hundred thirty-nine million, eight hundred one thousand, nine hundred ninety-nine".