1111415561 has 8 divisors (see below), whose sum is σ = 1119015744. Its totient is φ = 1103826960.

The previous prime is 1111415549. The next prime is 1111415563. The reversal of 1111415561 is 1655141111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111415561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111415561.

It is not an unprimeable number, because it can be changed into a prime (1111415563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280766 + ... + 284696.

It is an arithmetic number, because the mean of its divisors is an integer number (139876968).

Almost surely, 2^1111415561 is an apocalyptic number.

It is an amenable number.

1111415561 is a deficient number, since it is larger than the sum of its proper divisors (7600183).

1111415561 is a wasteful number, since it uses less digits than its factorization.

1111415561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791.

The product of its digits is 600, while the sum is 26.

The square root of 1111415561 is about 33337.8997688817. The cubic root of 1111415561 is about 1035.8387596715.

Adding to 1111415561 its reverse (1655141111), we get a palindrome (2766556672).

The spelling of 1111415561 in words is "one billion, one hundred eleven million, four hundred fifteen thousand, five hundred sixty-one".