161743068550 has 288 divisors, whose sum is σ = 379572804000. Its totient is φ = 50937384960.

The previous prime is 161743068511. The next prime is 161743068611. The reversal of 161743068550 is 55860347161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161743068550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 415791756 + ... + 415792144.

It is an arithmetic number, because the mean of its divisors is an integer number (1317961125).

Almost surely, 2^161743068550 is an apocalyptic number.

161743068550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161743068550 is an abundant number, since it is smaller than the sum of its proper divisors (217829735450).

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

161743068550 is a wasteful number, since it uses less digits than its factorization.

161743068550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 161743068550 in words is "one hundred sixty-one billion, seven hundred forty-three million, sixty-eight thousand, five hundred fifty".