1091334553309 has 36 divisors (see below), whose sum is σ = 1502753216412. Its totient is φ = 784975847040.

The previous prime is 1091334553303. The next prime is 1091334553399. The reversal of 1091334553309 is 9033554331901.

It can be written as a sum of positive squares in 2 ways, for example, as 416956901284 + 674377652025 = 645722^2 + 821205^2 .

It is not a de Polignac number, because 1091334553309 - 2⁵ = 1091334553277 is a prime.

It is a super-2 number, since 2×1091334553309² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091334553303) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7002432 + ... + 7156585.

Almost surely, 2^{1091334553309} is an apocalyptic number.

It is an amenable number.

1091334553309 is a deficient number, since it is larger than the sum of its proper divisors (411418663103).

1091334553309 is a wasteful number, since it uses less digits than its factorization.

1091334553309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14159066 (or 14159048 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 46.

The spelling of 1091334553309 in words is "one trillion, ninety-one billion, three hundred thirty-four million, five hundred fifty-three thousand, three hundred nine".