11548907821 has 32 divisors (see below), whose sum is σ = 13454512128. Its totient is φ = 9808223040.

The previous prime is 11548907809. The next prime is 11548907837. The reversal of 11548907821 is 12870984511.

11548907821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11548907821 - 2⁹ = 11548907309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11548907521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9000846 + ... + 9002128.

It is an arithmetic number, because the mean of its divisors is an integer number (420453504).

Almost surely, 2^11548907821 is an apocalyptic number.

11548907821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11548907821 is a deficient number, since it is larger than the sum of its proper divisors (1905604307).

11548907821 is a wasteful number, since it uses less digits than its factorization.

11548907821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 11548907821 in words is "eleven billion, five hundred forty-eight million, nine hundred seven thousand, eight hundred twenty-one".