11045551551 has 4 divisors (see below), whose sum is σ = 14727402072. Its totient is φ = 7363701032.

The previous prime is 11045551499. The next prime is 11045551591. The reversal of 11045551551 is 15515554011.

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 11045551551 - 2¹¹ = 11045549503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11045551591) 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, 1840925256 + ... + 1840925261.

It is an arithmetic number, because the mean of its divisors is an integer number (3681850518).

Almost surely, 2^11045551551 is an apocalyptic number.

11045551551 is a deficient number, since it is larger than the sum of its proper divisors (3681850521).

11045551551 is an equidigital number, since it uses as much as digits as its factorization.

11045551551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681850520.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 11045551551 in words is "eleven billion, forty-five million, five hundred fifty-one thousand, five hundred fifty-one".