11858430816 has 72 divisors (see below), whose sum is σ = 33948860400. Its totient is φ = 3926267136.

The previous prime is 11858430811. The next prime is 11858430851. The reversal of 11858430816 is 61803485811.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11858430811) 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, 95260 + ... + 181083.

It is an arithmetic number, because the mean of its divisors is an integer number (471511950).

Almost surely, 2^11858430816 is an apocalyptic number.

11858430816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11858430816 is an abundant number, since it is smaller than the sum of its proper divisors (22090429584).

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

11858430816 is a wasteful number, since it uses less digits than its factorization.

11858430816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276508 (or 276497 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 11858430816 in words is "eleven billion, eight hundred fifty-eight million, four hundred thirty thousand, eight hundred sixteen".