8911575649 has 4 divisors (see below), whose sum is σ = 8981745664. Its totient is φ = 8841405636.

The previous prime is 8911575641. The next prime is 8911575683. The reversal of 8911575649 is 9465751198.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 8911575649 - 2³ = 8911575641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8911575649.

It is not an unprimeable number, because it can be changed into a prime (8911575641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35084817 + ... + 35085070.

It is an arithmetic number, because the mean of its divisors is an integer number (2245436416).

Almost surely, 2^8911575649 is an apocalyptic number.

It is an amenable number.

8911575649 is a deficient number, since it is larger than the sum of its proper divisors (70170015).

8911575649 is a wasteful number, since it uses less digits than its factorization.

8911575649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70170014.

The product of its digits is 2721600, while the sum is 55.

The square root of 8911575649 is about 94401.1422017764. The cubic root of 8911575649 is about 2073.2491660817.

The spelling of 8911575649 in words is "eight billion, nine hundred eleven million, five hundred seventy-five thousand, six hundred forty-nine".