11543011620 has 96 divisors (see below), whose sum is σ = 37047698688. Its totient is φ = 2630541312.

The previous prime is 11543011559. The next prime is 11543011621. The reversal of 11543011620 is 2611034511.

It is a happy number.

It is a super-2 number, since 2×11543011620² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11543011621) 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, 100764 + ... + 182316.

It is an arithmetic number, because the mean of its divisors is an integer number (385913528).

Almost surely, 2^11543011620 is an apocalyptic number.

11543011620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11543011620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18523849344).

11543011620 is an abundant number, since it is smaller than the sum of its proper divisors (25504687068).

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

11543011620 is a wasteful number, since it uses less digits than its factorization.

11543011620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81909 (or 81907 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The spelling of 11543011620 in words is "eleven billion, five hundred forty-three million, eleven thousand, six hundred twenty".