13455503989 has 2 divisors, whose sum is σ = 13455503990. Its totient is φ = 13455503988.

The previous prime is 13455503977. The next prime is 13455504017. The reversal of 13455503989 is 98930555431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13388804100 + 66699889 = 115710^2 + 8167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13455503989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13455503189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6727751994 + 6727751995.

It is an arithmetic number, because the mean of its divisors is an integer number (6727751995).

Almost surely, 2^13455503989 is an apocalyptic number.

It is an amenable number.

13455503989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13455503989 is an equidigital number, since it uses as much as digits as its factorization.

13455503989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 13455503989 in words is "thirteen billion, four hundred fifty-five million, five hundred three thousand, nine hundred eighty-nine".