165787136 has 20 divisors (see below), whose sum is σ = 331251492. Its totient is φ = 82893312.

The previous prime is 165787091. The next prime is 165787177. The reversal of 165787136 is 631787561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161390 + ... + 162413.

Almost surely, 2^165787136 is an apocalyptic number.

165787136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165787136 is a deficient number, since it is larger than the sum of its proper divisors (165464356).

165787136 is an frugal number, since it uses more digits than its factorization.

165787136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323821 (or 323805 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The square root of 165787136 is about 12875.8353515413. The cubic root of 165787136 is about 549.3514515238.

The spelling of 165787136 in words is "one hundred sixty-five million, seven hundred eighty-seven thousand, one hundred thirty-six".