161347479808 has 72 divisors (see below), whose sum is σ = 343299713400. Its totient is φ = 75418337280.

The previous prime is 161347479767. The next prime is 161347479823. The reversal of 161347479808 is 808974743161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 283316224 + 161064163584 = 16832^2 + 401328^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 524038 + ... + 772858.

It is an arithmetic number, because the mean of its divisors is an integer number (4768051575).

Almost surely, 2^161347479808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161347479808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171649856700).

161347479808 is an abundant number, since it is smaller than the sum of its proper divisors (181952233592).

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

161347479808 is a wasteful number, since it uses less digits than its factorization.

161347479808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249003 (or 248989 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 161347479808 in words is "one hundred sixty-one billion, three hundred forty-seven million, four hundred seventy-nine thousand, eight hundred eight".