163640430346266 has 24 divisors (see below), whose sum is σ = 354556693592244. Its totient is φ = 54546436601280.

The previous prime is 163640430346249. The next prime is 163640430346303. The reversal of 163640430346266 is 662643034046361.

163640430346266 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 4 + 0 + 4 + 3 + 0 + 3 + 4 + 626 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 91466825141241 + 72173605205025 = 9563829^2 + 8495505^2 .

It is a super-2 number, since 2×163640430346266² (a number of 29 digits) contains 22 as substring.

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, 28418131 + ... + 33687846.

Almost surely, 2^{163640430346266} is an apocalyptic number.

163640430346266 is an abundant number, since it is smaller than the sum of its proper divisors (190916263245978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163640430346266 is a wasteful number, since it uses less digits than its factorization.

163640430346266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62252366 (or 62252363 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 54.

The spelling of 163640430346266 in words is "one hundred sixty-three trillion, six hundred forty billion, four hundred thirty million, three hundred forty-six thousand, two hundred sixty-six".