68435467517 has 2 divisors, whose sum is σ = 68435467518. Its totient is φ = 68435467516.

The previous prime is 68435467511. The next prime is 68435467577. The reversal of 68435467517 is 71576453486.

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., 39876495481 + 28558972036 = 199691^2 + 168994^2 .

It is a cyclic number.

It is not a de Polignac number, because 68435467517 - 2⁶ = 68435467453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68435467511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34217733758 + 34217733759.

It is an arithmetic number, because the mean of its divisors is an integer number (34217733759).

Almost surely, 2^68435467517 is an apocalyptic number.

It is an amenable number.

68435467517 is a deficient number, since it is larger than the sum of its proper divisors (1).

68435467517 is an equidigital number, since it uses as much as digits as its factorization.

68435467517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 56.

The spelling of 68435467517 in words is "sixty-eight billion, four hundred thirty-five million, four hundred sixty-seven thousand, five hundred seventeen".