1130661153781 has 4 divisors (see below), whose sum is σ = 1130672764332. Its totient is φ = 1130649543232.

The previous prime is 1130661153773. The next prime is 1130661153841. The reversal of 1130661153781 is 1873511660311.

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 998532538756 + 132128615025 = 999266^2 + 363495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1130661153781 - 2³ = 1130661153773 is a prime.

It is a super-2 number, since 2×1130661153781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130661163781) 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 in 3 ways as a sum of consecutive naturals, for example, 5657956 + ... + 5854381.

It is an arithmetic number, because the mean of its divisors is an integer number (282668191083).

Almost surely, 2^{1130661153781} is an apocalyptic number.

It is an amenable number.

1130661153781 is a deficient number, since it is larger than the sum of its proper divisors (11610551).

1130661153781 is an equidigital number, since it uses as much as digits as its factorization.

1130661153781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11610550.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 1130661153781 in words is "one trillion, one hundred thirty billion, six hundred sixty-one million, one hundred fifty-three thousand, seven hundred eighty-one".