1297556753951 has 2 divisors, whose sum is σ = 1297556753952. Its totient is φ = 1297556753950.

The previous prime is 1297556753887. The next prime is 1297556753953. The reversal of 1297556753951 is 1593576557921.

It is a strong prime.

It is an emirp because it is prime and its reverse (1593576557921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297556753951 - 2⁶ = 1297556753887 is a prime.

It is a super-2 number, since 2×1297556753951² (a number of 25 digits) contains 22 as substring.

Together with 1297556753953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297556753953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648778376975 + 648778376976.

It is an arithmetic number, because the mean of its divisors is an integer number (648778376976).

Almost surely, 2^{1297556753951} is an apocalyptic number.

1297556753951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297556753951 is an equidigital number, since it uses as much as digits as its factorization.

1297556753951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89302500, while the sum is 65.

The spelling of 1297556753951 in words is "one trillion, two hundred ninety-seven billion, five hundred fifty-six million, seven hundred fifty-three thousand, nine hundred fifty-one".