1536533661449 has 2 divisors, whose sum is σ = 1536533661450. Its totient is φ = 1536533661448.

The previous prime is 1536533661379. The next prime is 1536533661463. The reversal of 1536533661449 is 9441663356351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1522854721600 + 13678939849 = 1234040^2 + 116957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1536533661449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1536533661394 and 1536533661403.

It is not a weakly prime, because it can be changed into another prime (1536533661479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 768266830724 + 768266830725.

It is an arithmetic number, because the mean of its divisors is an integer number (768266830725).

Almost surely, 2^{1536533661449} is an apocalyptic number.

It is an amenable number.

1536533661449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1536533661449 is an equidigital number, since it uses as much as digits as its factorization.

1536533661449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20995200, while the sum is 56.

The spelling of 1536533661449 in words is "one trillion, five hundred thirty-six billion, five hundred thirty-three million, six hundred sixty-one thousand, four hundred forty-nine".