11506554421 has 4 divisors (see below), whose sum is σ = 11522125600. Its totient is φ = 11490983244.

The previous prime is 11506554407. The next prime is 11506554439. The reversal of 11506554421 is 12445560511.

11506554421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11506554421 - 2¹¹ = 11506552373 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 (11506554461) 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 3 ways as a sum of consecutive naturals, for example, 7784481 + ... + 7785958.

It is an arithmetic number, because the mean of its divisors is an integer number (2880531400).

Almost surely, 2^11506554421 is an apocalyptic number.

It is an amenable number.

11506554421 is a deficient number, since it is larger than the sum of its proper divisors (15571179).

11506554421 is an equidigital number, since it uses as much as digits as its factorization.

11506554421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571178.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 11506554421 in words is "eleven billion, five hundred six million, five hundred fifty-four thousand, four hundred twenty-one".