9008861649 has 4 divisors (see below), whose sum is σ = 12011815536. Its totient is φ = 6005907764.

The previous prime is 9008861623. The next prime is 9008861657. The reversal of 9008861649 is 9461688009.

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 9008861649 - 2²⁵ = 8975307217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9008861699) 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, 1501476939 + ... + 1501476944.

It is an arithmetic number, because the mean of its divisors is an integer number (3002953884).

Almost surely, 2^9008861649 is an apocalyptic number.

It is an amenable number.

9008861649 is a deficient number, since it is larger than the sum of its proper divisors (3002953887).

9008861649 is a wasteful number, since it uses less digits than its factorization.

9008861649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002953886.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 9008861649 is about 94915.0233050596. The cubic root of 9008861649 is about 2080.7663017988.

The spelling of 9008861649 in words is "nine billion, eight million, eight hundred sixty-one thousand, six hundred forty-nine".