15126863994817 has 2 divisors, whose sum is σ = 15126863994818. Its totient is φ = 15126863994816.

The previous prime is 15126863994791. The next prime is 15126863994871. The reversal of 15126863994817 is 71849936862151.

Together with next prime (15126863994871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11944461317776 + 3182402677041 = 3456076^2 + 1783929^2 .

It is a cyclic number.

It is not a de Polignac number, because 15126863994817 - 2⁷ = 15126863994689 is a prime.

It is not a weakly prime, because it can be changed into another prime (15126863094817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7563431997408 + 7563431997409.

It is an arithmetic number, because the mean of its divisors is an integer number (7563431997409).

Almost surely, 2^{15126863994817} is an apocalyptic number.

It is an amenable number.

15126863994817 is a deficient number, since it is larger than the sum of its proper divisors (1).

15126863994817 is an equidigital number, since it uses as much as digits as its factorization.

15126863994817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 70.

The spelling of 15126863994817 in words is "fifteen trillion, one hundred twenty-six billion, eight hundred sixty-three million, nine hundred ninety-four thousand, eight hundred seventeen".