163912891650 has 24 divisors (see below), whose sum is σ = 406503971664. Its totient is φ = 43710104400.

The previous prime is 163912891613. The next prime is 163912891663. The reversal of 163912891650 is 56198219361.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 163912891593 and 163912891602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546376156 + ... + 546376455.

It is an arithmetic number, because the mean of its divisors is an integer number (16937665486).

Almost surely, 2^163912891650 is an apocalyptic number.

163912891650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163912891650 is an abundant number, since it is smaller than the sum of its proper divisors (242591080014).

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

163912891650 is a wasteful number, since it uses less digits than its factorization.

163912891650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092752626 (or 1092752621 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 163912891650 in words is "one hundred sixty-three billion, nine hundred twelve million, eight hundred ninety-one thousand, six hundred fifty".