1257617496847 has 2 divisors, whose sum is σ = 1257617496848. Its totient is φ = 1257617496846.

The previous prime is 1257617496841. The next prime is 1257617497043. The reversal of 1257617496847 is 7486947167521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1257617496847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257617496841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628808748423 + 628808748424.

It is an arithmetic number, because the mean of its divisors is an integer number (628808748424).

Almost surely, 2^{1257617496847} is an apocalyptic number.

1257617496847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257617496847 is an equidigital number, since it uses as much as digits as its factorization.

1257617496847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142248960, while the sum is 67.

The spelling of 1257617496847 in words is "one trillion, two hundred fifty-seven billion, six hundred seventeen million, four hundred ninety-six thousand, eight hundred forty-seven".