1091009284573 has 16 divisors (see below), whose sum is σ = 1207695530160. Its totient is φ = 979339705344.

The previous prime is 1091009284571. The next prime is 1091009284613. The reversal of 1091009284573 is 3754829001901.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 55902454969 + 1035106829604 = 236437^2 + 1017402^2 .

It is not a de Polignac number, because 1091009284573 - 2¹ = 1091009284571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091009284571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6928638 + ... + 7084351.

It is an arithmetic number, because the mean of its divisors is an integer number (75480970635).

Almost surely, 2^{1091009284573} is an apocalyptic number.

1091009284573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1091009284573 is a deficient number, since it is larger than the sum of its proper divisors (116686245587).

1091009284573 is a wasteful number, since it uses less digits than its factorization.

1091009284573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14013168.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 1091009284573 in words is "one trillion, ninety-one billion, nine million, two hundred eighty-four thousand, five hundred seventy-three".