162728434138 has 8 divisors (see below), whose sum is σ = 244206879732. Its totient is φ = 81326140896.

The previous prime is 162728434129. The next prime is 162728434147. The reversal of 162728434138 is 831434827261.

It is an interprime number because it is at equal distance from previous prime (162728434129) and next prime (162728434147).

It can be written as a sum of positive squares in 2 ways, for example, as 150321370369 + 12407063769 = 387713^2 + 111387^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 162728434091 and 162728434100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19032745 + ... + 19041292.

Almost surely, 2^162728434138 is an apocalyptic number.

162728434138 is a deficient number, since it is larger than the sum of its proper divisors (81478445594).

162728434138 is a wasteful number, since it uses less digits than its factorization.

162728434138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38076176.

The product of its digits is 1548288, while the sum is 49.

The spelling of 162728434138 in words is "one hundred sixty-two billion, seven hundred twenty-eight million, four hundred thirty-four thousand, one hundred thirty-eight".