11145050551 has 4 divisors (see below), whose sum is σ = 11145264192. Its totient is φ = 11144836912.

The previous prime is 11145050549. The next prime is 11145050561. The reversal of 11145050551 is 15505054111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11145050551 - 2¹ = 11145050549 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 (11145050561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28971 + ... + 152083.

It is an arithmetic number, because the mean of its divisors is an integer number (2786316048).

Almost surely, 2^11145050551 is an apocalyptic number.

11145050551 is a deficient number, since it is larger than the sum of its proper divisors (213641).

11145050551 is an equidigital number, since it uses as much as digits as its factorization.

11145050551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213640.

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 11145050551 in words is "eleven billion, one hundred forty-five million, fifty thousand, five hundred fifty-one".