1331015676817 has 2 divisors, whose sum is σ = 1331015676818. Its totient is φ = 1331015676816.

The previous prime is 1331015676733. The next prime is 1331015676847. The reversal of 1331015676817 is 7186765101331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1330894478736 + 121198081 = 1153644^2 + 11009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331015676817 - 2²³ = 1331007288209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331015676847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665507838408 + 665507838409.

It is an arithmetic number, because the mean of its divisors is an integer number (665507838409).

Almost surely, 2^{1331015676817} is an apocalyptic number.

It is an amenable number.

1331015676817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331015676817 is an equidigital number, since it uses as much as digits as its factorization.

1331015676817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 1331015676817 in words is "one trillion, three hundred thirty-one billion, fifteen million, six hundred seventy-six thousand, eight hundred seventeen".