161407839218 has 8 divisors (see below), whose sum is σ = 244508905260. Its totient is φ = 79904870800.

The previous prime is 161407839217. The next prime is 161407839239. The reversal of 161407839218 is 812938704161.

It is a happy number.

161407839218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 127539694129 + 33868145089 = 357127^2 + 184033^2 .

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

It is a super-2 number, since 2×161407839218² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161407839217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399524153 + ... + 399524556.

Almost surely, 2^161407839218 is an apocalyptic number.

161407839218 is a deficient number, since it is larger than the sum of its proper divisors (83101066042).

161407839218 is a wasteful number, since it uses less digits than its factorization.

161407839218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799048812.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 161407839218 in words is "one hundred sixty-one billion, four hundred seven million, eight hundred thirty-nine thousand, two hundred eighteen".