1272393545977 has 2 divisors, whose sum is σ = 1272393545978. Its totient is φ = 1272393545976.

The previous prime is 1272393545953. The next prime is 1272393546019. The reversal of 1272393545977 is 7795453932721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801483305536 + 470910240441 = 895256^2 + 686229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272393545977 - 2⁷ = 1272393545849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1272393545177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636196772988 + 636196772989.

It is an arithmetic number, because the mean of its divisors is an integer number (636196772989).

Almost surely, 2^{1272393545977} is an apocalyptic number.

It is an amenable number.

1272393545977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272393545977 is an equidigital number, since it uses as much as digits as its factorization.

1272393545977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100018800, while the sum is 64.

The spelling of 1272393545977 in words is "one trillion, two hundred seventy-two billion, three hundred ninety-three million, five hundred forty-five thousand, nine hundred seventy-seven".