12889517795787 has 16 divisors (see below), whose sum is σ = 17638827755648. Its totient is φ = 8367817328640.

The previous prime is 12889517795779. The next prime is 12889517795789. The reversal of 12889517795787 is 78759771598821.

It is not a de Polignac number, because 12889517795787 - 2³ = 12889517795779 is a prime.

It is a super-2 number, since 2×12889517795787² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12889517795789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150891958 + ... + 150977355.

It is an arithmetic number, because the mean of its divisors is an integer number (1102426734728).

Almost surely, 2^{12889517795787} is an apocalyptic number.

12889517795787 is a deficient number, since it is larger than the sum of its proper divisors (4749309959861).

12889517795787 is a wasteful number, since it uses less digits than its factorization.

12889517795787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301869690.

The product of its digits is 4978713600, while the sum is 84.

The spelling of 12889517795787 in words is "twelve trillion, eight hundred eighty-nine billion, five hundred seventeen million, seven hundred ninety-five thousand, seven hundred eighty-seven".