154910517119989 has 2 divisors, whose sum is σ = 154910517119990. Its totient is φ = 154910517119988.

The previous prime is 154910517119987. The next prime is 154910517120011. The reversal of 154910517119989 is 989911715019451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120122520641764 + 34787996478225 = 10960042^2 + 5898135^2 .

It is a cyclic number.

It is not a de Polignac number, because 154910517119989 - 2¹ = 154910517119987 is a prime.

Together with 154910517119987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154910517119987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77455258559994 + 77455258559995.

It is an arithmetic number, because the mean of its divisors is an integer number (77455258559995).

Almost surely, 2^{154910517119989} is an apocalyptic number.

It is an amenable number.

154910517119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

154910517119989 is an equidigital number, since it uses as much as digits as its factorization.

154910517119989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36741600, while the sum is 70.

The spelling of 154910517119989 in words is "one hundred fifty-four trillion, nine hundred ten billion, five hundred seventeen million, one hundred nineteen thousand, nine hundred eighty-nine".