161115646018 has 16 divisors (see below), whose sum is σ = 244482001920. Its totient is φ = 79626362256.

The previous prime is 161115645961. The next prime is 161115646033. The reversal of 161115646018 is 810646511161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110696 + ... + 1247347.

It is an arithmetic number, because the mean of its divisors is an integer number (15280125120).

Almost surely, 2^161115646018 is an apocalyptic number.

161115646018 is a deficient number, since it is larger than the sum of its proper divisors (83366355902).

161115646018 is a wasteful number, since it uses less digits than its factorization.

161115646018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358441.

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 161115646018 in words is "one hundred sixty-one billion, one hundred fifteen million, six hundred forty-six thousand, eighteen".