11506311449 has 2 divisors, whose sum is σ = 11506311450. Its totient is φ = 11506311448.

The previous prime is 11506311413. The next prime is 11506311473. The reversal of 11506311449 is 94411360511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11094830224 + 411481225 = 105332^2 + 20285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11506311449 is a prime.

It is a super-2 number, since 2×11506311449² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11506311149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753155724 + 5753155725.

It is an arithmetic number, because the mean of its divisors is an integer number (5753155725).

Almost surely, 2^11506311449 is an apocalyptic number.

It is an amenable number.

11506311449 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506311449 is an equidigital number, since it uses as much as digits as its factorization.

11506311449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 11506311449 in words is "eleven billion, five hundred six million, three hundred eleven thousand, four hundred forty-nine".