11388647534 has 24 divisors (see below), whose sum is σ = 18806609640. Its totient is φ = 5168536560.

The previous prime is 11388647533. The next prime is 11388647539. The reversal of 11388647534 is 43574688311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11388647533) 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, 119012 + ... + 192200.

It is an arithmetic number, because the mean of its divisors is an integer number (783608735).

Almost surely, 2^11388647534 is an apocalyptic number.

11388647534 is a deficient number, since it is larger than the sum of its proper divisors (7417962106).

11388647534 is a wasteful number, since it uses less digits than its factorization.

11388647534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73856 (or 73845 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 11388647534 in words is "eleven billion, three hundred eighty-eight million, six hundred forty-seven thousand, five hundred thirty-four".