12771337077 has 24 divisors (see below), whose sum is σ = 19142405568. Its totient is φ = 8199072000.

The previous prime is 12771337063. The next prime is 12771337087. The reversal of 12771337077 is 77073317721.

12771337077 is a `hidden beast` number, since 1 + 277 + 1 + 3 + 370 + 7 + 7 = 666.

It is not a de Polignac number, because 12771337077 - 2²⁰ = 12770288501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12771337037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204924 + ... + 259877.

It is an arithmetic number, because the mean of its divisors is an integer number (797600232).

Almost surely, 2^12771337077 is an apocalyptic number.

It is an amenable number.

12771337077 is a deficient number, since it is larger than the sum of its proper divisors (6371068491).

12771337077 is a wasteful number, since it uses less digits than its factorization.

12771337077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464921 (or 464918 counting only the distinct ones).

The product of its (nonzero) digits is 302526, while the sum is 45.

The spelling of 12771337077 in words is "twelve billion, seven hundred seventy-one million, three hundred thirty-seven thousand, seventy-seven".