1116661010551 has 4 divisors (see below), whose sum is σ = 1152682333504. Its totient is φ = 1080639687600.

The previous prime is 1116661010501. The next prime is 1116661010593. The reversal of 1116661010551 is 1550101666111.

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

It is a cyclic number.

It is not a de Polignac number, because 1116661010551 - 2²³ = 1116652621943 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 (1116661010501) 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, 18010661430 + ... + 18010661491.

It is an arithmetic number, because the mean of its divisors is an integer number (288170583376).

Almost surely, 2^{1116661010551} is an apocalyptic number.

1116661010551 is a deficient number, since it is larger than the sum of its proper divisors (36021322953).

1116661010551 is an equidigital number, since it uses as much as digits as its factorization.

1116661010551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36021322952.

The product of its (nonzero) digits is 5400, while the sum is 34.

Adding to 1116661010551 its reverse (1550101666111), we get a palindrome (2666762676662).

The spelling of 1116661010551 in words is "one trillion, one hundred sixteen billion, six hundred sixty-one million, ten thousand, five hundred fifty-one".