1521046393849 has 2 divisors, whose sum is σ = 1521046393850. Its totient is φ = 1521046393848.

The previous prime is 1521046393819. The next prime is 1521046393873. The reversal of 1521046393849 is 9483936401251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221036050025 + 300010343824 = 1105005^2 + 547732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521046393849 - 2⁵ = 1521046393817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1521046393849.

It is not a weakly prime, because it can be changed into another prime (1521046393819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760523196924 + 760523196925.

It is an arithmetic number, because the mean of its divisors is an integer number (760523196925).

Almost surely, 2^{1521046393849} is an apocalyptic number.

It is an amenable number.

1521046393849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521046393849 is an equidigital number, since it uses as much as digits as its factorization.

1521046393849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 1521046393849 in words is "one trillion, five hundred twenty-one billion, forty-six million, three hundred ninety-three thousand, eight hundred forty-nine".