6638296654079 has 4 divisors (see below), whose sum is σ = 6639345530160. Its totient is φ = 6637247778000.

The previous prime is 6638296654021. The next prime is 6638296654091. The reversal of 6638296654079 is 9704566928366.

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-6638296654079 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 (6638296654009) 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, 524428547 + ... + 524441204.

It is an arithmetic number, because the mean of its divisors is an integer number (1659836382540).

Almost surely, 2^{6638296654079} is an apocalyptic number.

6638296654079 is a deficient number, since it is larger than the sum of its proper divisors (1048876081).

6638296654079 is a wasteful number, since it uses less digits than its factorization.

6638296654079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048876080.

The product of its (nonzero) digits is 705438720, while the sum is 71.

The spelling of 6638296654079 in words is "six trillion, six hundred thirty-eight billion, two hundred ninety-six million, six hundred fifty-four thousand, seventy-nine".