12669256320 has 128 divisors (see below), whose sum is σ = 46152339840. Its totient is φ = 2895826944.

The previous prime is 12669256309. The next prime is 12669256339. The reversal of 12669256320 is 2365296621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×12669256320³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 15 ways as a sum of consecutive naturals, for example, 457887 + ... + 484766.

It is an arithmetic number, because the mean of its divisors is an integer number (360565155).

Almost surely, 2^12669256320 is an apocalyptic number.

12669256320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12669256320 is an abundant number, since it is smaller than the sum of its proper divisors (33483083520).

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

12669256320 is an equidigital number, since it uses as much as digits as its factorization.

12669256320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942682 (or 942670 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 12669256320 in words is "twelve billion, six hundred sixty-nine million, two hundred fifty-six thousand, three hundred twenty".