168616663345 has 16 divisors (see below), whose sum is σ = 223219361232. Its totient is φ = 121479920640.

The previous prime is 168616663331. The next prime is 168616663361. The reversal of 168616663345 is 543366616861.

It can be written as a sum of positive squares in 8 ways, for example, as 69671186209 + 98945477136 = 263953^2 + 314556^2 .

It is not a de Polignac number, because 168616663345 - 2¹³ = 168616655153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31632732 + ... + 31638061.

It is an arithmetic number, because the mean of its divisors is an integer number (13951210077).

Almost surely, 2^168616663345 is an apocalyptic number.

It is an amenable number.

168616663345 is a deficient number, since it is larger than the sum of its proper divisors (54602697887).

168616663345 is a wasteful number, since it uses less digits than its factorization.

168616663345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63270852.

The product of its digits is 11197440, while the sum is 55.

The spelling of 168616663345 in words is "one hundred sixty-eight billion, six hundred sixteen million, six hundred sixty-three thousand, three hundred forty-five".