164169868545 has 12 divisors (see below), whose sum is σ = 284561105556. Its totient is φ = 87557263200.

The previous prime is 164169868529. The next prime is 164169868553. The reversal of 164169868545 is 545868961461.

164169868545 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 6 + 9 + 86 + 8 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 84583252224 + 79586616321 = 290832^2 + 282111^2 .

It is not a de Polignac number, because 164169868545 - 2⁴ = 164169868529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824109606 + ... + 1824109695.

It is an arithmetic number, because the mean of its divisors is an integer number (23713425463).

Almost surely, 2^164169868545 is an apocalyptic number.

164169868545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164169868545 is a deficient number, since it is larger than the sum of its proper divisors (120391237011).

164169868545 is a wasteful number, since it uses less digits than its factorization.

164169868545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648219312 (or 3648219309 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 164169868545 in words is "one hundred sixty-four billion, one hundred sixty-nine million, eight hundred sixty-eight thousand, five hundred forty-five".