161351842208 has 12 divisors (see below), whose sum is σ = 317661439410. Its totient is φ = 80675921088.

The previous prime is 161351842181. The next prime is 161351842219. The reversal of 161351842208 is 802248153161.

It can be written as a sum of positive squares in only one way, i.e., 108169947664 + 53181894544 = 328892^2 + 230612^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2521122503 + ... + 2521122566.

Almost surely, 2^161351842208 is an apocalyptic number.

It is an amenable number.

161351842208 is a deficient number, since it is larger than the sum of its proper divisors (156309597202).

161351842208 is an equidigital number, since it uses as much as digits as its factorization.

161351842208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042245079 (or 5042245071 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

Adding to 161351842208 its reverse (802248153161), we get a palindrome (963599995369).

The spelling of 161351842208 in words is "one hundred sixty-one billion, three hundred fifty-one million, eight hundred forty-two thousand, two hundred eight".