8648640029 has 4 divisors (see below), whose sum is σ = 8648849184. Its totient is φ = 8648430876.

The previous prime is 8648640019. The next prime is 8648640041. The reversal of 8648640029 is 9200468468.

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 a de Polignac number, because none of the positive numbers 2^k-8648640029 is a prime.

It is a super-2 number, since 2×8648640029² (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 (8648640019) 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, 19457 + ... + 132950.

It is an arithmetic number, because the mean of its divisors is an integer number (2162212296).

Almost surely, 2^8648640029 is an apocalyptic number.

It is an amenable number.

8648640029 is a deficient number, since it is larger than the sum of its proper divisors (209155).

8648640029 is a wasteful number, since it uses less digits than its factorization.

8648640029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209154.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 8648640029 is about 92998.0646519055. The cubic root of 8648640029 is about 2052.6549008148.

The spelling of 8648640029 in words is "eight billion, six hundred forty-eight million, six hundred forty thousand, twenty-nine".