161115646019 has 8 divisors (see below), whose sum is σ = 162688911840. Its totient is φ = 159542554176.

The previous prime is 161115645961. The next prime is 161115646033. The reversal of 161115646019 is 910646511161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161115646019 is a prime.

It is a super-2 number, since 2×161115646019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161115640019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2592599 + ... + 2654015.

It is an arithmetic number, because the mean of its divisors is an integer number (20336113980).

Almost surely, 2^161115646019 is an apocalyptic number.

161115646019 is a deficient number, since it is larger than the sum of its proper divisors (1573265821).

161115646019 is a wasteful number, since it uses less digits than its factorization.

161115646019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86989.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 161115646019 in words is "one hundred sixty-one billion, one hundred fifteen million, six hundred forty-six thousand, nineteen".