6820423864499 has 8 divisors (see below), whose sum is σ = 7797166335840. Its totient is φ = 5844280444416.

The previous prime is 6820423864489. The next prime is 6820423864547. The reversal of 6820423864499 is 9944683240286.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6820423864499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6820423864469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149738414 + ... + 149783955.

It is an arithmetic number, because the mean of its divisors is an integer number (974645791980).

Almost surely, 2^{6820423864499} is an apocalyptic number.

6820423864499 is a deficient number, since it is larger than the sum of its proper divisors (976742471341).

6820423864499 is a wasteful number, since it uses less digits than its factorization.

6820423864499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299525629.

The product of its (nonzero) digits is 143327232, while the sum is 65.

The spelling of 6820423864499 in words is "six trillion, eight hundred twenty billion, four hundred twenty-three million, eight hundred sixty-four thousand, four hundred ninety-nine".