1090610921689 has 4 divisors (see below), whose sum is σ = 1093735881700. Its totient is φ = 1087485961680.

The previous prime is 1090610921677. The next prime is 1090610921731. The reversal of 1090610921689 is 9861290160901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 928920078025 + 161690843664 = 963805^2 + 402108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090610921689 - 2²³ = 1090602533081 is a prime.

It is a super-2 number, since 2×1090610921689² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090610921629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562479482 + ... + 1562480179.

It is an arithmetic number, because the mean of its divisors is an integer number (273433970425).

Almost surely, 2^{1090610921689} is an apocalyptic number.

It is an amenable number.

1090610921689 is a deficient number, since it is larger than the sum of its proper divisors (3124960011).

1090610921689 is an equidigital number, since it uses as much as digits as its factorization.

1090610921689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124960010.

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 1090610921689 in words is "one trillion, ninety billion, six hundred ten million, nine hundred twenty-one thousand, six hundred eighty-nine".