12165535320 has 64 divisors (see below), whose sum is σ = 36626588640. Its totient is φ = 3232588800.

The previous prime is 12165535303. The next prime is 12165535321. The reversal of 12165535320 is 2353556121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165535321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146671 + ... + 214110.

Almost surely, 2^12165535320 is an apocalyptic number.

12165535320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12165535320 is an abundant number, since it is smaller than the sum of its proper divisors (24461053320).

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

12165535320 is a wasteful number, since it uses less digits than its factorization.

12165535320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361076 (or 361072 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 12165535320 in words is "twelve billion, one hundred sixty-five million, five hundred thirty-five thousand, three hundred twenty".