11315388816 has 30 divisors (see below), whose sum is σ = 31667373270. Its totient is φ = 3771796224.

The previous prime is 11315388793. The next prime is 11315388817. The reversal of 11315388816 is 61888351311.

11315388816 is a `hidden beast` number, since 1 + 1 + 31 + 538 + 8 + 81 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10692387216 + 623001600 = 103404^2 + 24960^2 .

It is not an unprimeable number, because it can be changed into a prime (11315388817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39289401 + ... + 39289688.

It is an arithmetic number, because the mean of its divisors is an integer number (1055579109).

Almost surely, 2^11315388816 is an apocalyptic number.

11315388816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11315388816 is an abundant number, since it is smaller than the sum of its proper divisors (20351984454).

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

11315388816 is a wasteful number, since it uses less digits than its factorization.

11315388816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78579103 (or 78579094 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The spelling of 11315388816 in words is "eleven billion, three hundred fifteen million, three hundred eighty-eight thousand, eight hundred sixteen".