11547445649 has 8 divisors (see below), whose sum is σ = 12171024360. Its totient is φ = 10938893056.

The previous prime is 11547445601. The next prime is 11547445661. The reversal of 11547445649 is 94654474511.

It can be written as a sum of positive squares in 4 ways, for example, as 6155187025 + 5392258624 = 78455^2 + 73432^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11547445649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11547445597 and 11547445606.

It is not an unprimeable number, because it can be changed into a prime (11547445549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3754952 + ... + 3758025.

It is an arithmetic number, because the mean of its divisors is an integer number (1521378045).

Almost surely, 2^11547445649 is an apocalyptic number.

It is an amenable number.

11547445649 is a deficient number, since it is larger than the sum of its proper divisors (623578711).

11547445649 is an equidigital number, since it uses as much as digits as its factorization.

11547445649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513059.

The product of its digits is 2419200, while the sum is 50.

The spelling of 11547445649 in words is "eleven billion, five hundred forty-seven million, four hundred forty-five thousand, six hundred forty-nine".