11540740881 has 4 divisors (see below), whose sum is σ = 15387654512. Its totient is φ = 7693827252.

The previous prime is 11540740879. The next prime is 11540740943. The reversal of 11540740881 is 18804704511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18804704511 = 3 ⋅6268234837.

It is not a de Polignac number, because 11540740881 - 2¹ = 11540740879 is a prime.

It is a super-2 number, since 2×11540740881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11540740801) 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 3 ways as a sum of consecutive naturals, for example, 1923456811 + ... + 1923456816.

It is an arithmetic number, because the mean of its divisors is an integer number (3846913628).

Almost surely, 2^11540740881 is an apocalyptic number.

It is an amenable number.

11540740881 is a deficient number, since it is larger than the sum of its proper divisors (3846913631).

11540740881 is an equidigital number, since it uses as much as digits as its factorization.

11540740881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846913630.

The product of its (nonzero) digits is 35840, while the sum is 39.

The spelling of 11540740881 in words is "eleven billion, five hundred forty million, seven hundred forty thousand, eight hundred eighty-one".