168406253851 has 8 divisors (see below), whose sum is σ = 191703561984. Its totient is φ = 146440220520.

The previous prime is 168406253843. The next prime is 168406253879. The reversal of 168406253851 is 158352604861.

168406253851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168406253851 - 2³ = 168406253843 is a prime.

It is a super-2 number, since 2×168406253851² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168406253795 and 168406253804.

It is not an unprimeable number, because it can be changed into a prime (168406253891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332818431 + ... + 332818936.

It is an arithmetic number, because the mean of its divisors is an integer number (23962945248).

Almost surely, 2^168406253851 is an apocalyptic number.

168406253851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

168406253851 is a deficient number, since it is larger than the sum of its proper divisors (23297308133).

168406253851 is a wasteful number, since it uses less digits than its factorization.

168406253851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665637401.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 168406253851 in words is "one hundred sixty-eight billion, four hundred six million, two hundred fifty-three thousand, eight hundred fifty-one".