12377527991 has 2 divisors, whose sum is σ = 12377527992. Its totient is φ = 12377527990.

The previous prime is 12377527949. The next prime is 12377527999. The reversal of 12377527991 is 19972577321.

12377527991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12377527991 - 2¹⁸ = 12377265847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12377527999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6188763995 + 6188763996.

It is an arithmetic number, because the mean of its divisors is an integer number (6188763996).

Almost surely, 2^12377527991 is an apocalyptic number.

12377527991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12377527991 is an equidigital number, since it uses as much as digits as its factorization.

12377527991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 53.

The spelling of 12377527991 in words is "twelve billion, three hundred seventy-seven million, five hundred twenty-seven thousand, nine hundred ninety-one".