1111561436 has 6 divisors (see below), whose sum is σ = 1945232520. Its totient is φ = 555780716.

The previous prime is 1111561433. The next prime is 1111561447. The reversal of 1111561436 is 6341651111.

It is a junction number, because it is equal to n+sod(n) for n = 1111561399 and 1111561408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111561433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138945176 + ... + 138945183.

It is an arithmetic number, because the mean of its divisors is an integer number (324205420).

Almost surely, 2^1111561436 is an apocalyptic number.

It is an amenable number.

1111561436 is a deficient number, since it is larger than the sum of its proper divisors (833671084).

1111561436 is a wasteful number, since it uses less digits than its factorization.

1111561436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277890363 (or 277890361 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 1111561436 is about 33340.0875223806. The cubic root of 1111561436 is about 1035.8840761651.

The spelling of 1111561436 in words is "one billion, one hundred eleven million, five hundred sixty-one thousand, four hundred thirty-six".