161511115162 has 8 divisors (see below), whose sum is σ = 243030921876. Its totient is φ = 80500807872.

The previous prime is 161511115151. The next prime is 161511115189. The reversal of 161511115162 is 261511115161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 156482745241 + 5028369921 = 395579^2 + 70911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127374063 + ... + 127375330.

Almost surely, 2^161511115162 is an apocalyptic number.

161511115162 is a deficient number, since it is larger than the sum of its proper divisors (81519806714).

161511115162 is a wasteful number, since it uses less digits than its factorization.

161511115162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254749712.

The product of its digits is 1800, while the sum is 31.

Subtracting 161511115162 from its reverse (261511115161), we obtain a palindrome (99999999999).

The spelling of 161511115162 in words is "one hundred sixty-one billion, five hundred eleven million, one hundred fifteen thousand, one hundred sixty-two".