12889416499778 has 24 divisors (see below), whose sum is σ = 24220771666812. Its totient is φ = 5099109823584.

The previous prime is 12889416499777. The next prime is 12889416499787. The reversal of 12889416499778 is 87799461498821.

It can be written as a sum of positive squares in 2 ways, for example, as 12842597493649 + 46819006129 = 3583657^2 + 216377^2 .

It is a super-2 number, since 2×12889416499778² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12889416499696 and 12889416499705.

It is not an unprimeable number, because it can be changed into a prime (12889416499777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5058639425 + ... + 5058641972.

Almost surely, 2^{12889416499778} is an apocalyptic number.

12889416499778 is a deficient number, since it is larger than the sum of its proper divisors (11331355167034).

12889416499778 is a wasteful number, since it uses less digits than its factorization.

12889416499778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117281426 (or 10117281419 counting only the distinct ones).

The product of its digits is 3511517184, while the sum is 83.

The spelling of 12889416499778 in words is "twelve trillion, eight hundred eighty-nine billion, four hundred sixteen million, four hundred ninety-nine thousand, seven hundred seventy-eight".