161779060 has 12 divisors (see below), whose sum is σ = 339736068. Its totient is φ = 64711616.

The previous prime is 161779031. The next prime is 161779063. The reversal of 161779060 is 60977161.

It can be written as a sum of positive squares in 2 ways, for example, as 96589584 + 65189476 = 9828^2 + 8074^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161779063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4044457 + ... + 4044496.

It is an arithmetic number, because the mean of its divisors is an integer number (28311339).

Almost surely, 2^161779060 is an apocalyptic number.

161779060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161779060 is an abundant number, since it is smaller than the sum of its proper divisors (177957008).

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

161779060 is a wasteful number, since it uses less digits than its factorization.

161779060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088962 (or 8088960 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 161779060 is about 12719.2397571553. The cubic root of 161779060 is about 544.8882412594. Note that the first 3 decimals are identical.

The spelling of 161779060 in words is "one hundred sixty-one million, seven hundred seventy-nine thousand, sixty".