12477343891 has 2 divisors, whose sum is σ = 12477343892. Its totient is φ = 12477343890.

The previous prime is 12477343861. The next prime is 12477343933. The reversal of 12477343891 is 19834377421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12477343891 - 2²⁷ = 12343126163 is a prime.

It is a super-2 number, since 2×12477343891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12477343811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6238671945 + 6238671946.

It is an arithmetic number, because the mean of its divisors is an integer number (6238671946).

Almost surely, 2^12477343891 is an apocalyptic number.

12477343891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12477343891 is an equidigital number, since it uses as much as digits as its factorization.

12477343891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The spelling of 12477343891 in words is "twelve billion, four hundred seventy-seven million, three hundred forty-three thousand, eight hundred ninety-one".