154515703664449 has 2 divisors, whose sum is σ = 154515703664450. Its totient is φ = 154515703664448.

The previous prime is 154515703664429. The next prime is 154515703664503. The reversal of 154515703664449 is 944466307515451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151862737027600 + 2652966636849 = 12323260^2 + 1628793^2 .

It is a cyclic number.

It is not a de Polignac number, because 154515703664449 - 2¹⁷ = 154515703533377 is a prime.

It is not a weakly prime, because it can be changed into another prime (154515703664429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77257851832224 + 77257851832225.

It is an arithmetic number, because the mean of its divisors is an integer number (77257851832225).

Almost surely, 2^{154515703664449} is an apocalyptic number.

It is an amenable number.

154515703664449 is a deficient number, since it is larger than the sum of its proper divisors (1).

154515703664449 is an equidigital number, since it uses as much as digits as its factorization.

154515703664449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728000, while the sum is 64.

The spelling of 154515703664449 in words is "one hundred fifty-four trillion, five hundred fifteen billion, seven hundred three million, six hundred sixty-four thousand, four hundred forty-nine".