11055999551 has 4 divisors (see below), whose sum is σ = 11291233632. Its totient is φ = 10820765472.

The previous prime is 11055999529. The next prime is 11055999571. The reversal of 11055999551 is 15599955011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11055999551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11055999551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11055999571) 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, 117616970 + ... + 117617063.

It is an arithmetic number, because the mean of its divisors is an integer number (2822808408).

Almost surely, 2^11055999551 is an apocalyptic number.

11055999551 is a deficient number, since it is larger than the sum of its proper divisors (235234081).

11055999551 is an equidigital number, since it uses as much as digits as its factorization.

11055999551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235234080.

The product of its (nonzero) digits is 455625, while the sum is 50.

The spelling of 11055999551 in words is "eleven billion, fifty-five million, nine hundred ninety-nine thousand, five hundred fifty-one".