12015542256 has 40 divisors (see below), whose sum is σ = 31266738384. Its totient is φ = 3975943680.

The previous prime is 12015542239. The next prime is 12015542261. The reversal of 12015542256 is 65224551021.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 907015 + ... + 920166.

Almost surely, 2^12015542256 is an apocalyptic number.

12015542256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12015542256 is an abundant number, since it is smaller than the sum of its proper divisors (19251196128).

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

12015542256 is a wasteful number, since it uses less digits than its factorization.

12015542256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827329 (or 1827323 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 12015542256 in words is "twelve billion, fifteen million, five hundred forty-two thousand, two hundred fifty-six".