12777671409215 has 4 divisors (see below), whose sum is σ = 15333205691064. Its totient is φ = 10222137127368.

The previous prime is 12777671409163. The next prime is 12777671409247. The reversal of 12777671409215 is 51290417677721.

It is a happy number.

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-12777671409215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277767140917 + ... + 1277767140926.

It is an arithmetic number, because the mean of its divisors is an integer number (3833301422766).

Almost surely, 2^{12777671409215} is an apocalyptic number.

12777671409215 is a deficient number, since it is larger than the sum of its proper divisors (2555534281849).

12777671409215 is an equidigital number, since it uses as much as digits as its factorization.

12777671409215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555534281848.

The product of its (nonzero) digits is 10372320, while the sum is 59.

The spelling of 12777671409215 in words is "twelve trillion, seven hundred seventy-seven billion, six hundred seventy-one million, four hundred nine thousand, two hundred fifteen".