1281641883917 has 2 divisors, whose sum is σ = 1281641883918. Its totient is φ = 1281641883916.

The previous prime is 1281641883911. The next prime is 1281641883953. The reversal of 1281641883917 is 7193881461821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791297423401 + 490344460516 = 889549^2 + 700246^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281641883917 - 2²² = 1281637689613 is a prime.

It is a super-2 number, since 2×1281641883917² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281641883911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640820941958 + 640820941959.

It is an arithmetic number, because the mean of its divisors is an integer number (640820941959).

Almost surely, 2^{1281641883917} is an apocalyptic number.

It is an amenable number.

1281641883917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281641883917 is an equidigital number, since it uses as much as digits as its factorization.

1281641883917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 59.

The spelling of 1281641883917 in words is "one trillion, two hundred eighty-one billion, six hundred forty-one million, eight hundred eighty-three thousand, nine hundred seventeen".