12256515305406 has 48 divisors (see below), whose sum is σ = 26718564023424. Its totient is φ = 4060468788432.

The previous prime is 12256515305389. The next prime is 12256515305407. The reversal of 12256515305406 is 60450351565221.

12256515305406 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 6 + 51 + 53 + 0 + 540 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256515305407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21320461 + ... + 21887783.

It is an arithmetic number, because the mean of its divisors is an integer number (556636750488).

Almost surely, 2^{12256515305406} is an apocalyptic number.

12256515305406 is an abundant number, since it is smaller than the sum of its proper divisors (14462048718018).

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

12256515305406 is a wasteful number, since it uses less digits than its factorization.

12256515305406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574685 (or 574682 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 12256515305406 in words is "twelve trillion, two hundred fifty-six billion, five hundred fifteen million, three hundred five thousand, four hundred six".