161829927438 has 16 divisors (see below), whose sum is σ = 340694584320. Its totient is φ = 51104187576.

The previous prime is 161829927403. The next prime is 161829927443. The reversal of 161829927438 is 834729928161.

161829927438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709780270 + ... + 709780497.

It is an arithmetic number, because the mean of its divisors is an integer number (21293411520).

Almost surely, 2^161829927438 is an apocalyptic number.

161829927438 is an abundant number, since it is smaller than the sum of its proper divisors (178864656882).

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

161829927438 is a wasteful number, since it uses less digits than its factorization.

161829927438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419560791.

The product of its digits is 10450944, while the sum is 60.

The spelling of 161829927438 in words is "one hundred sixty-one billion, eight hundred twenty-nine million, nine hundred twenty-seven thousand, four hundred thirty-eight".