6389779156993 has 8 divisors (see below), whose sum is σ = 6418909742112. Its totient is φ = 6360657184416.

The previous prime is 6389779156973. The next prime is 6389779157033. The reversal of 6389779156993 is 3996519779836.

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-6389779156993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6389779156973) 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, 663580 + ... + 3635917.

It is an arithmetic number, because the mean of its divisors is an integer number (802363717764).

Almost surely, 2^{6389779156993} is an apocalyptic number.

It is an amenable number.

6389779156993 is a deficient number, since it is larger than the sum of its proper divisors (29130585119).

6389779156993 is a wasteful number, since it uses less digits than its factorization.

6389779156993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306271.

The product of its digits is 4166497440, while the sum is 82.

The spelling of 6389779156993 in words is "six trillion, three hundred eighty-nine billion, seven hundred seventy-nine million, one hundred fifty-six thousand, nine hundred ninety-three".