1049555549509 has 2 divisors, whose sum is σ = 1049555549510. Its totient is φ = 1049555549508.

The previous prime is 1049555549501. The next prime is 1049555549527. The reversal of 1049555549509 is 9059455559401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994856630625 + 54698918884 = 997425^2 + 233878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1049555549509 - 2³ = 1049555549501 is a prime.

It is a super-2 number, since 2×1049555549509² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1049555549501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 524777774754 + 524777774755.

It is an arithmetic number, because the mean of its divisors is an integer number (524777774755).

Almost surely, 2^{1049555549509} is an apocalyptic number.

It is an amenable number.

1049555549509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1049555549509 is an equidigital number, since it uses as much as digits as its factorization.

1049555549509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450000, while the sum is 61.

The spelling of 1049555549509 in words is "one trillion, forty-nine billion, five hundred fifty-five million, five hundred forty-nine thousand, five hundred nine".