165150388 has 24 divisors (see below), whose sum is σ = 319660712. Its totient is φ = 74162304.

The previous prime is 165150383. The next prime is 165150407. The reversal of 165150388 is 883051561.

It can be written as a sum of positive squares in 4 ways, for example, as 68757264 + 96393124 = 8292^2 + 9818^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165150383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40995 + ... + 44842.

Almost surely, 2^165150388 is an apocalyptic number.

It is an amenable number.

165150388 is a deficient number, since it is larger than the sum of its proper divisors (154510324).

165150388 is a wasteful number, since it uses less digits than its factorization.

165150388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85891 (or 85889 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 165150388 is about 12851.0850903727. The cubic root of 165150388 is about 548.6472408218.

The spelling of 165150388 in words is "one hundred sixty-five million, one hundred fifty thousand, three hundred eighty-eight".