12740920581677 has 2 divisors, whose sum is σ = 12740920581678. Its totient is φ = 12740920581676.

The previous prime is 12740920581619. The next prime is 12740920581703. The reversal of 12740920581677 is 77618502904721.

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., 8327501119081 + 4413419462596 = 2885741^2 + 2100814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12740920581677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12740920587677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6370460290838 + 6370460290839.

It is an arithmetic number, because the mean of its divisors is an integer number (6370460290839).

Almost surely, 2^{12740920581677} is an apocalyptic number.

It is an amenable number.

12740920581677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12740920581677 is an equidigital number, since it uses as much as digits as its factorization.

12740920581677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11854080, while the sum is 59.

The spelling of 12740920581677 in words is "twelve trillion, seven hundred forty billion, nine hundred twenty million, five hundred eighty-one thousand, six hundred seventy-seven".