163700340640 has 24 divisors (see below), whose sum is σ = 386742055140. Its totient is φ = 65480136192.

The previous prime is 163700340631. The next prime is 163700340659. The reversal of 163700340640 is 46043007361.

163700340640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162967230864 + 733109776 = 403692^2 + 27076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163700340596 and 163700340605.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 511563405 + ... + 511563724.

Almost surely, 2^163700340640 is an apocalyptic number.

163700340640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163700340640 is an abundant number, since it is smaller than the sum of its proper divisors (223041714500).

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

163700340640 is a wasteful number, since it uses less digits than its factorization.

163700340640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023127144 (or 1023127136 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 163700340640 in words is "one hundred sixty-three billion, seven hundred million, three hundred forty thousand, six hundred forty".