11508245681 has 2 divisors, whose sum is σ = 11508245682. Its totient is φ = 11508245680.

The previous prime is 11508245663. The next prime is 11508245719. The reversal of 11508245681 is 18654280511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9877378225 + 1630867456 = 99385^2 + 40384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11508245681 is a prime.

It is a super-2 number, since 2×11508245681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11508244681) 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 as a sum of consecutive naturals, namely, 5754122840 + 5754122841.

It is an arithmetic number, because the mean of its divisors is an integer number (5754122841).

Almost surely, 2^11508245681 is an apocalyptic number.

It is an amenable number.

11508245681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11508245681 is an equidigital number, since it uses as much as digits as its factorization.

11508245681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 41.

The spelling of 11508245681 in words is "eleven billion, five hundred eight million, two hundred forty-five thousand, six hundred eighty-one".