161404505050 has 96 divisors (see below), whose sum is σ = 334862942400. Its totient is φ = 57521064960.

The previous prime is 161404505039. The next prime is 161404505051. The reversal of 161404505050 is 50505404161.

It is not an unprimeable number, because it can be changed into a prime (161404505051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26143764 + ... + 26149936.

It is an arithmetic number, because the mean of its divisors is an integer number (3488155650).

Almost surely, 2^161404505050 is an apocalyptic number.

161404505050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161404505050 is an abundant number, since it is smaller than the sum of its proper divisors (173458437350).

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

161404505050 is a wasteful number, since it uses less digits than its factorization.

161404505050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840 (or 7835 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 161404505050 in words is "one hundred sixty-one billion, four hundred four million, five hundred five thousand, fifty".