1017831618497 has 2 divisors, whose sum is σ = 1017831618498. Its totient is φ = 1017831618496.

The previous prime is 1017831618491. The next prime is 1017831618521. The reversal of 1017831618497 is 7948161387101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941425813441 + 76405805056 = 970271^2 + 276416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1017831618497 is a prime.

It is a super-2 number, since 2×1017831618497² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1017831618491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508915809248 + 508915809249.

It is an arithmetic number, because the mean of its divisors is an integer number (508915809249).

Almost surely, 2^{1017831618497} is an apocalyptic number.

It is an amenable number.

1017831618497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017831618497 is an equidigital number, since it uses as much as digits as its factorization.

1017831618497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 1017831618497 in words is "one trillion, seventeen billion, eight hundred thirty-one million, six hundred eighteen thousand, four hundred ninety-seven".