154648266989 has 2 divisors, whose sum is σ = 154648266990. Its totient is φ = 154648266988.

The previous prime is 154648266961. The next prime is 154648267001. The reversal of 154648266989 is 989662846451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151288325764 + 3359941225 = 388958^2 + 57965^2 .

It is an emirp because it is prime and its reverse (989662846451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154648266989 - 2¹² = 154648262893 is a prime.

It is a super-2 number, since 2×154648266989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154648266919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77324133494 + 77324133495.

It is an arithmetic number, because the mean of its divisors is an integer number (77324133495).

Almost surely, 2^154648266989 is an apocalyptic number.

It is an amenable number.

154648266989 is a deficient number, since it is larger than the sum of its proper divisors (1).

154648266989 is an equidigital number, since it uses as much as digits as its factorization.

154648266989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179159040, while the sum is 68.

The spelling of 154648266989 in words is "one hundred fifty-four billion, six hundred forty-eight million, two hundred sixty-six thousand, nine hundred eighty-nine".