12889517795779 has 2 divisors, whose sum is σ = 12889517795780. Its totient is φ = 12889517795778.

The previous prime is 12889517795699. The next prime is 12889517795789. The reversal of 12889517795779 is 97759771598821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12889517795779 - 2²¹ = 12889515698627 is a prime.

It is a super-2 number, since 2×12889517795779² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12889517795696 and 12889517795705.

It is not a weakly prime, because it can be changed into another prime (12889517795789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444758897889 + 6444758897890.

It is an arithmetic number, because the mean of its divisors is an integer number (6444758897890).

Almost surely, 2^{12889517795779} is an apocalyptic number.

12889517795779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12889517795779 is an equidigital number, since it uses as much as digits as its factorization.

12889517795779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5601052800, while the sum is 85.

The spelling of 12889517795779 in words is "twelve trillion, eight hundred eighty-nine billion, five hundred seventeen million, seven hundred ninety-five thousand, seven hundred seventy-nine".