165641532 has 48 divisors (see below), whose sum is σ = 442455552. Its totient is φ = 47246400.

The previous prime is 165641519. The next prime is 165641537. The reversal of 165641532 is 235146561.

It is a junction number, because it is equal to n+sod(n) for n = 165641493 and 165641502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165641537) 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 15 ways as a sum of consecutive naturals, for example, 63657 + ... + 66207.

It is an arithmetic number, because the mean of its divisors is an integer number (9217824).

Almost surely, 2^165641532 is an apocalyptic number.

165641532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165641532 is an abundant number, since it is smaller than the sum of its proper divisors (276814020).

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

165641532 is a wasteful number, since it uses less digits than its factorization.

165641532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338 (or 3336 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 165641532 is about 12870.1799521219. The cubic root of 165641532 is about 549.1905801824.

The spelling of 165641532 in words is "one hundred sixty-five million, six hundred forty-one thousand, five hundred thirty-two".