12777988507 has 4 divisors (see below), whose sum is σ = 12875530536. Its totient is φ = 12680446480.

The previous prime is 12777988501. The next prime is 12777988567. The reversal of 12777988507 is 70588977721.

12777988507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12777988507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12777988501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48770818 + ... + 48771079.

It is an arithmetic number, because the mean of its divisors is an integer number (3218882634).

Almost surely, 2^12777988507 is an apocalyptic number.

12777988507 is a deficient number, since it is larger than the sum of its proper divisors (97542029).

12777988507 is an equidigital number, since it uses as much as digits as its factorization.

12777988507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97542028.

The product of its (nonzero) digits is 13829760, while the sum is 61.

The spelling of 12777988507 in words is "twelve billion, seven hundred seventy-seven million, nine hundred eighty-eight thousand, five hundred seven".