1275618728551 has 2 divisors, whose sum is σ = 1275618728552. Its totient is φ = 1275618728550.

The previous prime is 1275618728521. The next prime is 1275618728557. The reversal of 1275618728551 is 1558278165721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1275618728551 - 2²³ = 1275610339943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275618728557) 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, 637809364275 + 637809364276.

It is an arithmetic number, because the mean of its divisors is an integer number (637809364276).

Almost surely, 2^{1275618728551} is an apocalyptic number.

1275618728551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275618728551 is an equidigital number, since it uses as much as digits as its factorization.

1275618728551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408000, while the sum is 58.

The spelling of 1275618728551 in words is "one trillion, two hundred seventy-five billion, six hundred eighteen million, seven hundred twenty-eight thousand, five hundred fifty-one".