168999973730 has 16 divisors (see below), whose sum is σ = 347657088960. Its totient is φ = 57942848112.

The previous prime is 168999973699. The next prime is 168999973777. The reversal of 168999973730 is 37379999861.

It is a super-2 number, since 2×168999973730² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207142600 + ... + 1207142739.

It is an arithmetic number, because the mean of its divisors is an integer number (21728568060).

Almost surely, 2^168999973730 is an apocalyptic number.

168999973730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168999973730 is an abundant number, since it is smaller than the sum of its proper divisors (178657115230).

168999973730 is a wasteful number, since it uses less digits than its factorization.

168999973730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414285353.

The product of its (nonzero) digits is 138883248, while the sum is 71.

The spelling of 168999973730 in words is "one hundred sixty-eight billion, nine hundred ninety-nine million, nine hundred seventy-three thousand, seven hundred thirty".