163640463240331 has 48 divisors (see below), whose sum is σ = 209201428481760. Its totient is φ = 126569470917120.

The previous prime is 163640463240277. The next prime is 163640463240427. The reversal of 163640463240331 is 133042364046361.

It is not a de Polignac number, because 163640463240331 - 2⁷ = 163640463240203 is a prime.

It is a super-2 number, since 2×163640463240331² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163640463240131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56111265 + ... + 58955533.

It is an arithmetic number, because the mean of its divisors is an integer number (4358363093370).

Almost surely, 2^{163640463240331} is an apocalyptic number.

163640463240331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163640463240331 is a deficient number, since it is larger than the sum of its proper divisors (45560965241429).

163640463240331 is a wasteful number, since it uses less digits than its factorization.

163640463240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845084 (or 2845077 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 46.

The spelling of 163640463240331 in words is "one hundred sixty-three trillion, six hundred forty billion, four hundred sixty-three million, two hundred forty thousand, three hundred thirty-one".