8649251287 has 4 divisors (see below), whose sum is σ = 8651060640. Its totient is φ = 8647441936.

The previous prime is 8649251267. The next prime is 8649251291. The reversal of 8649251287 is 7821529468.

8649251287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8649251287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649251267) 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, 897487 + ... + 907072.

It is an arithmetic number, because the mean of its divisors is an integer number (2162765160).

Almost surely, 2^8649251287 is an apocalyptic number.

8649251287 is a deficient number, since it is larger than the sum of its proper divisors (1809353).

8649251287 is a wasteful number, since it uses less digits than its factorization.

8649251287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809352.

The product of its digits is 1935360, while the sum is 52.

The square root of 8649251287 is about 93001.3509955635. The cubic root of 8649251287 is about 2052.7032580196.

The spelling of 8649251287 in words is "eight billion, six hundred forty-nine million, two hundred fifty-one thousand, two hundred eighty-seven".