1550720849 has 2 divisors, whose sum is σ = 1550720850. Its totient is φ = 1550720848.

The previous prime is 1550720761. The next prime is 1550720879. The reversal of 1550720849 is 9480270551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1477018624 + 73702225 = 38432^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550720849 - 2⁸ = 1550720593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1550720879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775360424 + 775360425.

It is an arithmetic number, because the mean of its divisors is an integer number (775360425).

Almost surely, 2^1550720849 is an apocalyptic number.

It is an amenable number.

1550720849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550720849 is an equidigital number, since it uses as much as digits as its factorization.

1550720849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 1550720849 is about 39379.1930973706. The cubic root of 1550720849 is about 1157.4739047494.

The spelling of 1550720849 in words is "one billion, five hundred fifty million, seven hundred twenty thousand, eight hundred forty-nine".