11563908858 has 192 divisors, whose sum is σ = 29041459200. Its totient is φ = 3305111040.

The previous prime is 11563908791. The next prime is 11563908869. The reversal of 11563908858 is 85880936511.

It is a super-2 number, since 2×11563908858² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 in 95 ways as a sum of consecutive naturals, for example, 11460258 + ... + 11461266.

It is an arithmetic number, because the mean of its divisors is an integer number (151257600).

Almost surely, 2^11563908858 is an apocalyptic number.

11563908858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11563908858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14520729600).

11563908858 is an abundant number, since it is smaller than the sum of its proper divisors (17477550342).

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

11563908858 is a wasteful number, since it uses less digits than its factorization.

11563908858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 11563908858 in words is "eleven billion, five hundred sixty-three million, nine hundred eight thousand, eight hundred fifty-eight".