161277162112 has 64 divisors (see below), whose sum is σ = 350719525440. Its totient is φ = 73262499840.

The previous prime is 161277162077. The next prime is 161277162139. The reversal of 161277162112 is 211261772161.

It is a tau number, because it is divible by the number of its divisors (64).

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, 2298493 + ... + 2367619.

It is an arithmetic number, because the mean of its divisors is an integer number (5479992585).

Almost surely, 2^161277162112 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 161277162112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175359762720).

161277162112 is an abundant number, since it is smaller than the sum of its proper divisors (189442363328).

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

161277162112 is a wasteful number, since it uses less digits than its factorization.

161277162112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70809 (or 70797 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The spelling of 161277162112 in words is "one hundred sixty-one billion, two hundred seventy-seven million, one hundred sixty-two thousand, one hundred twelve".