11581159551 has 16 divisors (see below), whose sum is σ = 16631287680. Its totient is φ = 7126040160.

The previous prime is 11581159493. The next prime is 11581159559. The reversal of 11581159551 is 15595118511.

It is not a de Polignac number, because 11581159551 - 2⁶ = 11581159487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11581159559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651540 + ... + 669078.

It is an arithmetic number, because the mean of its divisors is an integer number (1039455480).

Almost surely, 2^11581159551 is an apocalyptic number.

11581159551 is a deficient number, since it is larger than the sum of its proper divisors (5050128129).

11581159551 is a wasteful number, since it uses less digits than its factorization.

11581159551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34486.

The product of its digits is 45000, while the sum is 42.

The spelling of 11581159551 in words is "eleven billion, five hundred eighty-one million, one hundred fifty-nine thousand, five hundred fifty-one".