168469985807644 has 12 divisors (see below), whose sum is σ = 304988767410600. Its totient is φ = 81330337976048.

The previous prime is 168469985807609. The next prime is 168469985807653. The reversal of 168469985807644 is 446708589964861.

168469985807644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×168469985807644² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726163731814 + ... + 726163732045.

It is an arithmetic number, because the mean of its divisors is an integer number (25415730617550).

Almost surely, 2^{168469985807644} is an apocalyptic number.

It is an amenable number.

168469985807644 is a deficient number, since it is larger than the sum of its proper divisors (136518781602956).

168469985807644 is a wasteful number, since it uses less digits than its factorization.

168469985807644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452327463892 (or 1452327463890 counting only the distinct ones).

The product of its (nonzero) digits is 20065812480, while the sum is 85.

The spelling of 168469985807644 in words is "one hundred sixty-eight trillion, four hundred sixty-nine billion, nine hundred eighty-five million, eight hundred seven thousand, six hundred forty-four".