1111557056611 has 4 divisors (see below), whose sum is σ = 1111573747872. Its totient is φ = 1111540365352.

The previous prime is 1111557056581. The next prime is 1111557056651. The reversal of 1111557056611 is 1166507551111.

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 1111557056611 - 2²³ = 1111548668003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111557056651) 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, 8245336 + ... + 8379061.

It is an arithmetic number, because the mean of its divisors is an integer number (277893436968).

Almost surely, 2^{1111557056611} is an apocalyptic number.

1111557056611 is a deficient number, since it is larger than the sum of its proper divisors (16691261).

1111557056611 is an equidigital number, since it uses as much as digits as its factorization.

1111557056611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16691260.

The product of its (nonzero) digits is 31500, while the sum is 40.

The spelling of 1111557056611 in words is "one trillion, one hundred eleven billion, five hundred fifty-seven million, fifty-six thousand, six hundred eleven".