11215344549 has 12 divisors (see below), whose sum is σ = 15327422048. Its totient is φ = 7294529760.

The previous prime is 11215344463. The next prime is 11215344557. The reversal of 11215344549 is 94544351211.

It is a de Polignac number, because none of the positive numbers 2^k-11215344549 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 (11215344559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1106929 + ... + 1117014.

Almost surely, 2^11215344549 is an apocalyptic number.

It is an amenable number.

11215344549 is a deficient number, since it is larger than the sum of its proper divisors (4112077499).

11215344549 is an equidigital number, since it uses as much as digits as its factorization.

11215344549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224028 (or 2223987 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The spelling of 11215344549 in words is "eleven billion, two hundred fifteen million, three hundred forty-four thousand, five hundred forty-nine".