161205160650 has 48 divisors (see below), whose sum is σ = 399814142400. Its totient is φ = 42985317760.

The previous prime is 161205160637. The next prime is 161205160651. The reversal of 161205160650 is 56061502161.

It is not an unprimeable number, because it can be changed into a prime (161205160651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3699691 + ... + 3743009.

It is an arithmetic number, because the mean of its divisors is an integer number (8329461300).

Almost surely, 2^161205160650 is an apocalyptic number.

161205160650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161205160650 is an abundant number, since it is smaller than the sum of its proper divisors (238608981750).

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

161205160650 is a wasteful number, since it uses less digits than its factorization.

161205160650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68143 (or 68138 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 161205160650 in words is "one hundred sixty-one billion, two hundred five million, one hundred sixty thousand, six hundred fifty".