12776278921147 has 32 divisors (see below), whose sum is σ = 15542623032192. Its totient is φ = 10252094275584.

The previous prime is 12776278921139. The next prime is 12776278921183. The reversal of 12776278921147 is 74112987267721.

It is not a de Polignac number, because 12776278921147 - 2³ = 12776278921139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12776278924147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185837563 + ... + 185906299.

It is an arithmetic number, because the mean of its divisors is an integer number (485706969756).

Almost surely, 2^{12776278921147} is an apocalyptic number.

12776278921147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12776278921147 is a deficient number, since it is larger than the sum of its proper divisors (2766344111045).

12776278921147 is a wasteful number, since it uses less digits than its factorization.

12776278921147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77047.

The product of its digits is 33191424, while the sum is 64.

The spelling of 12776278921147 in words is "twelve trillion, seven hundred seventy-six billion, two hundred seventy-eight million, nine hundred twenty-one thousand, one hundred forty-seven".