165672727138 has 16 divisors (see below), whose sum is σ = 255236357880. Its totient is φ = 80594130816.

The previous prime is 165672727109. The next prime is 165672727159. The reversal of 165672727138 is 831727276561.

It can be written as a sum of positive squares in 4 ways, for example, as 152008753689 + 13663973449 = 389883^2 + 116893^2 .

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, 3284920 + ... + 3334972.

Almost surely, 2^165672727138 is an apocalyptic number.

165672727138 is a deficient number, since it is larger than the sum of its proper divisors (89563630742).

165672727138 is a wasteful number, since it uses less digits than its factorization.

165672727138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94821.

The product of its digits is 5927040, while the sum is 55.

The spelling of 165672727138 in words is "one hundred sixty-five billion, six hundred seventy-two million, seven hundred twenty-seven thousand, one hundred thirty-eight".