11006055551 has 4 divisors (see below), whose sum is σ = 11020595352. Its totient is φ = 10991515752.

The previous prime is 11006055509. The next prime is 11006055559. The reversal of 11006055551 is 15555060011.

It is a happy number.

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 11006055551 - 2¹⁴ = 11006039167 is a prime.

It is a super-2 number, since 2×11006055551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11006055559) 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, 7268765 + ... + 7270278.

It is an arithmetic number, because the mean of its divisors is an integer number (2755148838).

Almost surely, 2^11006055551 is an apocalyptic number.

11006055551 is a deficient number, since it is larger than the sum of its proper divisors (14539801).

11006055551 is an equidigital number, since it uses as much as digits as its factorization.

11006055551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14539800.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 11006055551 in words is "eleven billion, six million, fifty-five thousand, five hundred fifty-one".