11459987771 has 2 divisors, whose sum is σ = 11459987772. Its totient is φ = 11459987770.

The previous prime is 11459987761. The next prime is 11459987783. The reversal of 11459987771 is 17778995411.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11459987771 is a prime.

It is a super-2 number, since 2×11459987771² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11459987771.

It is not a weakly prime, because it can be changed into another prime (11459987761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5729993885 + 5729993886.

It is an arithmetic number, because the mean of its divisors is an integer number (5729993886).

Almost surely, 2^11459987771 is an apocalyptic number.

11459987771 is a deficient number, since it is larger than the sum of its proper divisors (1).

11459987771 is an equidigital number, since it uses as much as digits as its factorization.

11459987771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 59.

The spelling of 11459987771 in words is "eleven billion, four hundred fifty-nine million, nine hundred eighty-seven thousand, seven hundred seventy-one".