12454435680989 has 2 divisors, whose sum is σ = 12454435680990. Its totient is φ = 12454435680988.

The previous prime is 12454435680949. The next prime is 12454435681087. The reversal of 12454435680989 is 98908653445421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7469562302500 + 4984873378489 = 2733050^2 + 2232683^2 .

It is an emirp because it is prime and its reverse (98908653445421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12454435680989 is a prime.

It is a super-2 number, since 2×12454435680989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12454435680919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6227217840494 + 6227217840495.

It is an arithmetic number, because the mean of its divisors is an integer number (6227217840495).

Almost surely, 2^{12454435680989} is an apocalyptic number.

It is an amenable number.

12454435680989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12454435680989 is an equidigital number, since it uses as much as digits as its factorization.

12454435680989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 298598400, while the sum is 68.

The spelling of 12454435680989 in words is "twelve trillion, four hundred fifty-four billion, four hundred thirty-five million, six hundred eighty thousand, nine hundred eighty-nine".