161116015646 has 4 divisors (see below), whose sum is σ = 241674023472. Its totient is φ = 80558007822.

The previous prime is 161116015601. The next prime is 161116015661. The reversal of 161116015646 is 646510611161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646510611161 = 23 ⋅28109157007.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40279003910 + ... + 40279003913.

It is an arithmetic number, because the mean of its divisors is an integer number (60418505868).

Almost surely, 2^161116015646 is an apocalyptic number.

161116015646 is a deficient number, since it is larger than the sum of its proper divisors (80558007826).

161116015646 is an equidigital number, since it uses as much as digits as its factorization.

161116015646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80558007825.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 161116015646 in words is "one hundred sixty-one billion, one hundred sixteen million, fifteen thousand, six hundred forty-six".