165255638 has 8 divisors (see below), whose sum is σ = 248021832. Its totient is φ = 82581696.

The previous prime is 165255631. The next prime is 165255647. The reversal of 165255638 is 836552561.

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 = 165255595 and 165255604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165255631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18395 + ... + 25862.

It is an arithmetic number, because the mean of its divisors is an integer number (31002729).

Almost surely, 2^165255638 is an apocalyptic number.

165255638 is a deficient number, since it is larger than the sum of its proper divisors (82766194).

165255638 is a wasteful number, since it uses less digits than its factorization.

165255638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46126.

The product of its digits is 216000, while the sum is 41.

The square root of 165255638 is about 12855.1794230964. The cubic root of 165255638 is about 548.7637666546.

The spelling of 165255638 in words is "one hundred sixty-five million, two hundred fifty-five thousand, six hundred thirty-eight".