1283523257857 has 2 divisors, whose sum is σ = 1283523257858. Its totient is φ = 1283523257856.

The previous prime is 1283523257843. The next prime is 1283523257873. The reversal of 1283523257857 is 7587523253821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 691299125136 + 592224132721 = 831444^2 + 769561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283523257857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1283523857857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641761628928 + 641761628929.

It is an arithmetic number, because the mean of its divisors is an integer number (641761628929).

Almost surely, 2^{1283523257857} is an apocalyptic number.

It is an amenable number.

1283523257857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283523257857 is an equidigital number, since it uses as much as digits as its factorization.

1283523257857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224000, while the sum is 58.

The spelling of 1283523257857 in words is "one trillion, two hundred eighty-three billion, five hundred twenty-three million, two hundred fifty-seven thousand, eight hundred fifty-seven".