12777776378895 has 32 divisors (see below), whose sum is σ = 22332490467840. Its totient is φ = 6187101459840.

The previous prime is 12777776378819. The next prime is 12777776378923. The reversal of 12777776378895 is 59887367777721.

It is not a de Polignac number, because 12777776378895 - 2⁹ = 12777776378383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51025075 + ... + 51274884.

It is an arithmetic number, because the mean of its divisors is an integer number (697890327120).

Almost surely, 2^{12777776378895} is an apocalyptic number.

12777776378895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12777776378895 is a deficient number, since it is larger than the sum of its proper divisors (9554714088945).

12777776378895 is a wasteful number, since it uses less digits than its factorization.

12777776378895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102300735.

The product of its digits is 12197848320, while the sum is 84.

The spelling of 12777776378895 in words is "twelve trillion, seven hundred seventy-seven billion, seven hundred seventy-six million, three hundred seventy-eight thousand, eight hundred ninety-five".