8649471951 has 16 divisors (see below), whose sum is σ = 12846325600. Its totient is φ = 5751782784.

The previous prime is 8649471911. The next prime is 8649471967. The reversal of 8649471951 is 1591749468.

8649471951 is a `hidden beast` number, since 86 + 4 + 9 + 471 + 95 + 1 = 666.

8649471951 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8649471951 - 2⁷ = 8649471823 is a prime.

It is a super-2 number, since 2×8649471951² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649471911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392746 + ... + 414183.

It is an arithmetic number, because the mean of its divisors is an integer number (802895350).

Almost surely, 2^8649471951 is an apocalyptic number.

8649471951 is a deficient number, since it is larger than the sum of its proper divisors (4196853649).

8649471951 is a wasteful number, since it uses less digits than its factorization.

8649471951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807335 (or 807329 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 8649471951 is about 93002.5373363544. The cubic root of 8649471951 is about 2052.7207143999.

The spelling of 8649471951 in words is "eight billion, six hundred forty-nine million, four hundred seventy-one thousand, nine hundred fifty-one".