165010638 has 32 divisors (see below), whose sum is σ = 367668000. Its totient is φ = 49021056.

The previous prime is 165010627. The next prime is 165010661. The reversal of 165010638 is 836010561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34213 + ... + 38736.

It is an arithmetic number, because the mean of its divisors is an integer number (11489625).

Almost surely, 2^165010638 is an apocalyptic number.

165010638 is an abundant number, since it is smaller than the sum of its proper divisors (202657362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165010638 is a wasteful number, since it uses less digits than its factorization.

165010638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72996.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 165010638 is about 12845.6466555795. The cubic root of 165010638 is about 548.4924423379.

The spelling of 165010638 in words is "one hundred sixty-five million, ten thousand, six hundred thirty-eight".