11109999949 has 4 divisors (see below), whose sum is σ = 11168167680. Its totient is φ = 11051832220.

The previous prime is 11109999893. The next prime is 11109999961. The reversal of 11109999949 is 94999990111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11109999949 - 2⁹ = 11109999437 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 (11109999049) 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, 29083579 + ... + 29083960.

It is an arithmetic number, because the mean of its divisors is an integer number (2792041920).

Almost surely, 2^11109999949 is an apocalyptic number.

It is an amenable number.

11109999949 is a deficient number, since it is larger than the sum of its proper divisors (58167731).

11109999949 is an equidigital number, since it uses as much as digits as its factorization.

11109999949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58167730.

The product of its (nonzero) digits is 2125764, while the sum is 61.

The spelling of 11109999949 in words is "eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred forty-nine".