168510091851 has 16 divisors (see below), whose sum is σ = 252116313120. Its totient is φ = 111227781600.

The previous prime is 168510091829. The next prime is 168510091861. The reversal of 168510091851 is 158190015861.

It is not a de Polignac number, because 168510091851 - 2⁷ = 168510091723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168510091797 and 168510091806.

It is not an unprimeable number, because it can be changed into a prime (168510091801) 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, 30893880 + ... + 30899333.

It is an arithmetic number, because the mean of its divisors is an integer number (15757269570).

Almost surely, 2^168510091851 is an apocalyptic number.

168510091851 is a deficient number, since it is larger than the sum of its proper divisors (83606221269).

168510091851 is a wasteful number, since it uses less digits than its factorization.

168510091851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61793323 (or 61793317 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 45.

The spelling of 168510091851 in words is "one hundred sixty-eight billion, five hundred ten million, ninety-one thousand, eight hundred fifty-one".