169216138 has 32 divisors (see below), whose sum is σ = 317084544. Its totient is φ = 65938752.

The previous prime is 169216123. The next prime is 169216141. The reversal of 169216138 is 831612961.

It is a junction number, because it is equal to n+sod(n) for n = 169216097 and 169216106.

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, 5256 + ... + 19132.

It is an arithmetic number, because the mean of its divisors is an integer number (9908892).

Almost surely, 2^169216138 is an apocalyptic number.

169216138 is a deficient number, since it is larger than the sum of its proper divisors (147868406).

169216138 is a wasteful number, since it uses less digits than its factorization.

169216138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966.

The product of its digits is 15552, while the sum is 37.

The square root of 169216138 is about 13008.3103437764. The cubic root of 169216138 is about 553.1130768834.

The spelling of 169216138 in words is "one hundred sixty-nine million, two hundred sixteen thousand, one hundred thirty-eight".