11405544551 has 8 divisors (see below), whose sum is σ = 11456210304. Its totient is φ = 11354906880.

The previous prime is 11405544547. The next prime is 11405544559. The reversal of 11405544551 is 15544550411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11405544551 - 2² = 11405544547 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 (11405544559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1530731 + ... + 1538163.

It is an arithmetic number, because the mean of its divisors is an integer number (1432026288).

Almost surely, 2^11405544551 is an apocalyptic number.

11405544551 is a deficient number, since it is larger than the sum of its proper divisors (50665753).

11405544551 is an equidigital number, since it uses as much as digits as its factorization.

11405544551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14041.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 11405544551 in words is "eleven billion, four hundred five million, five hundred forty-four thousand, five hundred fifty-one".