165481788 has 24 divisors (see below), whose sum is σ = 386334592. Its totient is φ = 55130544.

The previous prime is 165481787. The next prime is 165481793. The reversal of 165481788 is 887184561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165481787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36081 + ... + 40407.

Almost surely, 2^165481788 is an apocalyptic number.

It is an amenable number.

165481788 is an abundant number, since it is smaller than the sum of its proper divisors (220852804).

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

165481788 is a wasteful number, since it uses less digits than its factorization.

165481788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521 (or 7519 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 165481788 is about 12863.9724813138. The cubic root of 165481788 is about 549.0139776999.

It can be divided in two parts, 16548 and 1788, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 165481788 in words is "one hundred sixty-five million, four hundred eighty-one thousand, seven hundred eighty-eight".