164512138 has 16 divisors (see below), whose sum is σ = 289643904. Its totient is φ = 68599440.

The previous prime is 164512129. The next prime is 164512141. The reversal of 164512138 is 831215461.

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, 158278 + ... + 159313.

It is an arithmetic number, because the mean of its divisors is an integer number (18102744).

Almost surely, 2^164512138 is an apocalyptic number.

164512138 is a deficient number, since it is larger than the sum of its proper divisors (125131766).

164512138 is a wasteful number, since it uses less digits than its factorization.

164512138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317637.

The product of its digits is 5760, while the sum is 31.

The square root of 164512138 is about 12826.2285181576. The cubic root of 164512138 is about 547.9395501367.

Adding to 164512138 its reverse (831215461), we get a palindrome (995727599).

It can be divided in two parts, 16 and 4512138, that added together give a palindrome (4512154).

The spelling of 164512138 in words is "one hundred sixty-four million, five hundred twelve thousand, one hundred thirty-eight".