11213731544 has 8 divisors (see below), whose sum is σ = 21025746660. Its totient is φ = 5606865768.

The previous prime is 11213731541. The next prime is 11213731579. The reversal of 11213731544 is 44513731211.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 11213731544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213731541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700858214 + ... + 700858229.

Almost surely, 2^11213731544 is an apocalyptic number.

It is an amenable number.

11213731544 is a deficient number, since it is larger than the sum of its proper divisors (9812015116).

11213731544 is a wasteful number, since it uses less digits than its factorization.

11213731544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401716449 (or 1401716445 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The spelling of 11213731544 in words is "eleven billion, two hundred thirteen million, seven hundred thirty-one thousand, five hundred forty-four".