11235554551 has 4 divisors (see below), whose sum is σ = 12099827992. Its totient is φ = 10371281112.

The previous prime is 11235554531. The next prime is 11235554567. The reversal of 11235554551 is 15545553211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15545553211 = 29 ⋅536053559.

It is a cyclic number.

It is not a de Polignac number, because 11235554551 - 2¹⁵ = 11235521783 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 11235554551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11235554531) 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, 432136701 + ... + 432136726.

It is an arithmetic number, because the mean of its divisors is an integer number (3024956998).

Almost surely, 2^11235554551 is an apocalyptic number.

11235554551 is a deficient number, since it is larger than the sum of its proper divisors (864273441).

11235554551 is an equidigital number, since it uses as much as digits as its factorization.

11235554551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864273440.

The product of its digits is 75000, while the sum is 37.

The spelling of 11235554551 in words is "eleven billion, two hundred thirty-five million, five hundred fifty-four thousand, five hundred fifty-one".