1100256336661 has 4 divisors (see below), whose sum is σ = 1112618767500. Its totient is φ = 1087893905824.

The previous prime is 1100256336653. The next prime is 1100256336703. The reversal of 1100256336661 is 1666336520011.

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 643508796100 + 456747540561 = 802190^2 + 675831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100256336661 - 2³ = 1100256336653 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 (1100256336601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6181215286 + ... + 6181215463.

It is an arithmetic number, because the mean of its divisors is an integer number (278154691875).

Almost surely, 2^{1100256336661} is an apocalyptic number.

It is an amenable number.

1100256336661 is a deficient number, since it is larger than the sum of its proper divisors (12362430839).

1100256336661 is an equidigital number, since it uses as much as digits as its factorization.

1100256336661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12362430838.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 1100256336661 in words is "one trillion, one hundred billion, two hundred fifty-six million, three hundred thirty-six thousand, six hundred sixty-one".