11553391488 has 256 divisors, whose sum is σ = 34470973440. Its totient is φ = 3410657280.

The previous prime is 11553391483. The next prime is 11553391523. The reversal of 11553391488 is 88419335511.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553391481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7486845 + ... + 7488387.

It is an arithmetic number, because the mean of its divisors is an integer number (134652240).

Almost surely, 2^11553391488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11553391488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17235486720).

11553391488 is an abundant number, since it is smaller than the sum of its proper divisors (22917581952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11553391488 is a wasteful number, since it uses less digits than its factorization.

11553391488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1633 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The spelling of 11553391488 in words is "eleven billion, five hundred fifty-three million, three hundred ninety-one thousand, four hundred eighty-eight".