11123556907 has 4 divisors (see below), whose sum is σ = 11607189840. Its totient is φ = 10639923976.

The previous prime is 11123556893. The next prime is 11123556923. The reversal of 11123556907 is 70965532111.

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 11123556907 - 2⁷ = 11123556779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11123556907.

It is not an unprimeable number, because it can be changed into a prime (11123556967) 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, 241816432 + ... + 241816477.

It is an arithmetic number, because the mean of its divisors is an integer number (2901797460).

Almost surely, 2^11123556907 is an apocalyptic number.

11123556907 is a deficient number, since it is larger than the sum of its proper divisors (483632933).

11123556907 is an equidigital number, since it uses as much as digits as its factorization.

11123556907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483632932.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 11123556907 in words is "eleven billion, one hundred twenty-three million, five hundred fifty-six thousand, nine hundred seven".