11055421551 has 8 divisors (see below), whose sum is σ = 14743254064. Its totient is φ = 7368935040.

The previous prime is 11055421511. The next prime is 11055421591. The reversal of 11055421551 is 15512455011.

It is an interprime number because it is at equal distance from previous prime (11055421511) and next prime (11055421591).

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

It is not a de Polignac number, because 11055421551 - 2¹⁵ = 11055388783 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 (11055421511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317176 + ... + 350301.

It is an arithmetic number, because the mean of its divisors is an integer number (1842906758).

Almost surely, 2^11055421551 is an apocalyptic number.

11055421551 is a deficient number, since it is larger than the sum of its proper divisors (3687832513).

11055421551 is an equidigital number, since it uses as much as digits as its factorization.

11055421551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673001.

The product of its (nonzero) digits is 5000, while the sum is 30.

Adding to 11055421551 its reverse (15512455011), we get a palindrome (26567876562).

The spelling of 11055421551 in words is "eleven billion, fifty-five million, four hundred twenty-one thousand, five hundred fifty-one".