12455641401989 has 2 divisors, whose sum is σ = 12455641401990. Its totient is φ = 12455641401988.

The previous prime is 12455641401901. The next prime is 12455641402073. The reversal of 12455641401989 is 98910414655421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7384398630625 + 5071242771364 = 2717425^2 + 2251942^2 .

It is a cyclic number.

It is not a de Polignac number, because 12455641401989 - 2⁸ = 12455641401733 is a prime.

It is a super-2 number, since 2×12455641401989² (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 (12455641451989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6227820700994 + 6227820700995.

It is an arithmetic number, because the mean of its divisors is an integer number (6227820700995).

Almost surely, 2^{12455641401989} is an apocalyptic number.

It is an amenable number.

12455641401989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12455641401989 is an equidigital number, since it uses as much as digits as its factorization.

12455641401989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 12455641401989 in words is "twelve trillion, four hundred fifty-five billion, six hundred forty-one million, four hundred one thousand, nine hundred eighty-nine".