12756103511781 has 16 divisors (see below), whose sum is σ = 19704144239744. Its totient is φ = 7189349923584.

The previous prime is 12756103511771. The next prime is 12756103511791. The reversal of 12756103511781 is 18711530165721.

It is an interprime number because it is at equal distance from previous prime (12756103511771) and next prime (12756103511791).

It is not a de Polignac number, because 12756103511781 - 2¹⁰ = 12756103510757 is a prime.

It is a super-2 number, since 2×12756103511781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12756103511781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12756103511771) 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, 4160501896 + ... + 4160504961.

It is an arithmetic number, because the mean of its divisors is an integer number (1231509014984).

Almost surely, 2^{12756103511781} is an apocalyptic number.

It is an amenable number.

12756103511781 is a deficient number, since it is larger than the sum of its proper divisors (6948040727963).

12756103511781 is an equidigital number, since it uses as much as digits as its factorization.

12756103511781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321006940.

The product of its (nonzero) digits is 352800, while the sum is 48.

The spelling of 12756103511781 in words is "twelve trillion, seven hundred fifty-six billion, one hundred three million, five hundred eleven thousand, seven hundred eighty-one".