12747572081 has 2 divisors, whose sum is σ = 12747572082. Its totient is φ = 12747572080.

The previous prime is 12747572069. The next prime is 12747572087. The reversal of 12747572081 is 18027574721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8895507856 + 3852064225 = 94316^2 + 62065^2 .

It is a cyclic number.

It is not a de Polignac number, because 12747572081 - 2³⁰ = 11673830257 is a prime.

It is a super-2 number, since 2×12747572081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12747572087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6373786040 + 6373786041.

It is an arithmetic number, because the mean of its divisors is an integer number (6373786041).

Almost surely, 2^12747572081 is an apocalyptic number.

It is an amenable number.

12747572081 is a deficient number, since it is larger than the sum of its proper divisors (1).

12747572081 is an equidigital number, since it uses as much as digits as its factorization.

12747572081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 12747572081 in words is "twelve billion, seven hundred forty-seven million, five hundred seventy-two thousand, eighty-one".