11347516581 has 12 divisors (see below), whose sum is σ = 15453660096. Its totient is φ = 7403228040.

The previous prime is 11347516511. The next prime is 11347516597. The reversal of 11347516581 is 18561574311.

11347516581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11347516581 - 2¹⁷ = 11347385509 is a prime.

It is a super-2 number, since 2×11347516581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11347516511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260426 + ... + 1269396.

It is an arithmetic number, because the mean of its divisors is an integer number (1287805008).

Almost surely, 2^11347516581 is an apocalyptic number.

It is an amenable number.

11347516581 is a deficient number, since it is larger than the sum of its proper divisors (4106143515).

11347516581 is an frugal number, since it uses more digits than its factorization.

11347516581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17992 (or 9021 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The spelling of 11347516581 in words is "eleven billion, three hundred forty-seven million, five hundred sixteen thousand, five hundred eighty-one".