165630209152 has 16 divisors (see below), whose sum is σ = 329966432550. Its totient is φ = 82815104512.

The previous prime is 165630209131. The next prime is 165630209197. The reversal of 165630209152 is 251902036561.

It can be written as a sum of positive squares in only one way, i.e., 82976259136 + 82653950016 = 288056^2 + 287496^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646992877 + ... + 646993132.

Almost surely, 2^165630209152 is an apocalyptic number.

It is an amenable number.

165630209152 is a deficient number, since it is larger than the sum of its proper divisors (164336223398).

165630209152 is an equidigital number, since it uses as much as digits as its factorization.

165630209152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293986023 (or 1293986011 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 165630209152 in words is "one hundred sixty-five billion, six hundred thirty million, two hundred nine thousand, one hundred fifty-two".