161418662216 has 64 divisors (see below), whose sum is σ = 365288985600. Its totient is φ = 65324791872.

The previous prime is 161418662173. The next prime is 161418662221. The reversal of 161418662216 is 612266814161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79565 + ... + 573731.

It is an arithmetic number, because the mean of its divisors is an integer number (5707640400).

Almost surely, 2^161418662216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161418662216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182644492800).

161418662216 is an abundant number, since it is smaller than the sum of its proper divisors (203870323384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161418662216 is a wasteful number, since it uses less digits than its factorization.

161418662216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494506 (or 494502 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The spelling of 161418662216 in words is "one hundred sixty-one billion, four hundred eighteen million, six hundred sixty-two thousand, two hundred sixteen".