12156420480 has 64 divisors (see below), whose sum is σ = 38748596400. Its totient is φ = 3241711616.

The previous prime is 12156420473. The next prime is 12156420481. The reversal of 12156420480 is 8402465121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156420481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3163815 + ... + 3167654.

Almost surely, 2^12156420480 is an apocalyptic number.

12156420480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156420480 is an abundant number, since it is smaller than the sum of its proper divisors (26592175920).

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

12156420480 is an equidigital number, since it uses as much as digits as its factorization.

12156420480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331491 (or 6331479 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 12156420480 in words is "twelve billion, one hundred fifty-six million, four hundred twenty thousand, four hundred eighty".