1305620265497 has 2 divisors, whose sum is σ = 1305620265498. Its totient is φ = 1305620265496.

The previous prime is 1305620265409. The next prime is 1305620265503. The reversal of 1305620265497 is 7945620265031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043208933376 + 262411332121 = 1021376^2 + 512261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305620265497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305620265997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652810132748 + 652810132749.

It is an arithmetic number, because the mean of its divisors is an integer number (652810132749).

Almost surely, 2^{1305620265497} is an apocalyptic number.

It is an amenable number.

1305620265497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305620265497 is an equidigital number, since it uses as much as digits as its factorization.

1305620265497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 1305620265497 in words is "one trillion, three hundred five billion, six hundred twenty million, two hundred sixty-five thousand, four hundred ninety-seven".