12640648718 has 8 divisors (see below), whose sum is σ = 19318727448. Its totient is φ = 6201072904.

The previous prime is 12640648717. The next prime is 12640648723. The reversal of 12640648718 is 81784604621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640648711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59625596 + ... + 59625807.

It is an arithmetic number, because the mean of its divisors is an integer number (2414840931).

Almost surely, 2^12640648718 is an apocalyptic number.

12640648718 is a deficient number, since it is larger than the sum of its proper divisors (6678078730).

12640648718 is a wasteful number, since it uses less digits than its factorization.

12640648718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119251458.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 12640648718 in words is "twelve billion, six hundred forty million, six hundred forty-eight thousand, seven hundred eighteen".