12729273999977 has 2 divisors, whose sum is σ = 12729273999978. Its totient is φ = 12729273999976.

The previous prime is 12729273999917. The next prime is 12729274000031. The reversal of 12729273999977 is 77999937292721.

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., 12692232763456 + 37041236521 = 3562616^2 + 192461^2 .

It is a cyclic number.

It is not a de Polignac number, because 12729273999977 - 2²² = 12729269805673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12729273999895 and 12729273999904.

It is not a weakly prime, because it can be changed into another prime (12729273999907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364636999988 + 6364636999989.

It is an arithmetic number, because the mean of its divisors is an integer number (6364636999989).

Almost surely, 2^{12729273999977} is an apocalyptic number.

It is an amenable number.

12729273999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729273999977 is an equidigital number, since it uses as much as digits as its factorization.

12729273999977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402639576, while the sum is 83.

The spelling of 12729273999977 in words is "twelve trillion, seven hundred twenty-nine billion, two hundred seventy-three million, nine hundred ninety-nine thousand, nine hundred seventy-seven".