1550404440449 has 2 divisors, whose sum is σ = 1550404440450. Its totient is φ = 1550404440448.

The previous prime is 1550404440443. The next prime is 1550404440469. The reversal of 1550404440449 is 9440444040551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001086294849 + 549318145600 = 1000543^2 + 741160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550404440449 - 2¹² = 1550404436353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1550404440443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775202220224 + 775202220225.

It is an arithmetic number, because the mean of its divisors is an integer number (775202220225).

Almost surely, 2^{1550404440449} is an apocalyptic number.

It is an amenable number.

1550404440449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550404440449 is an equidigital number, since it uses as much as digits as its factorization.

1550404440449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 1550404440449 in words is "one trillion, five hundred fifty billion, four hundred four million, four hundred forty thousand, four hundred forty-nine".