8631710649 has 81 divisors (see below), whose sum is σ = 13749362991. Its totient is φ = 5418336240.

The previous prime is 8631710627. The next prime is 8631710653. The reversal of 8631710649 is 9460171368.

It is a happy number.

The square root of 8631710649 is 92907.

It is a perfect power (a square), and thus also a powerful number.

8631710649 is a `hidden beast` number, since 8 + 631 + 7 + 1 + 0 + 6 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7723773225 + 907937424 = 87885^2 + 30132^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 8631710649 - 2⁵ = 8631710617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8631710149) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 233289459 + ... + 233289495.

Almost surely, 2^8631710649 is an apocalyptic number.

8631710649 is the 92907-th square number.

8631710649 is the 46454-th centered octagonal number.

It is an amenable number.

8631710649 is a deficient number, since it is larger than the sum of its proper divisors (5117652342).

8631710649 is an frugal number, since it uses more digits than its factorization.

8631710649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The cubic root of 8631710649 is about 2051.3146949773.

The spelling of 8631710649 in words is "eight billion, six hundred thirty-one million, seven hundred ten thousand, six hundred forty-nine".