8636640471 has 10 divisors (see below), whose sum is σ = 12901648232. Its totient is φ = 5757760260.

The previous prime is 8636640451. The next prime is 8636640473. The reversal of 8636640471 is 1740466368.

It is a happy number.

8636640471 is a `hidden beast` number, since 8 + 636 + 6 + 4 + 0 + 4 + 7 + 1 = 666.

It is not a de Polignac number, because 8636640471 - 2¹⁰ = 8636639447 is a prime.

It is a super-3 number, since 3×8636640471³ (a number of 31 digits) contains 333 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 (8636640473) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 53312515 + ... + 53312676.

Almost surely, 2^8636640471 is an apocalyptic number.

8636640471 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8636640471 is a deficient number, since it is larger than the sum of its proper divisors (4265007761).

8636640471 is a wasteful number, since it uses less digits than its factorization.

8636640471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106625203 (or 106625194 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 8636640471 is about 92933.5271632364. The cubic root of 8636640471 is about 2051.7051425619.

The spelling of 8636640471 in words is "eight billion, six hundred thirty-six million, six hundred forty thousand, four hundred seventy-one".