6396938667 has 24 divisors (see below), whose sum is σ = 10733147360. Its totient is φ = 3595466880.

The previous prime is 6396938657. The next prime is 6396938689. The reversal of 6396938667 is 7668396936.

It is not a de Polignac number, because 6396938667 - 2⁷ = 6396938539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6396938627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828442 + ... + 836127.

Almost surely, 2^6396938667 is an apocalyptic number.

6396938667 is a deficient number, since it is larger than the sum of its proper divisors (4336208693).

6396938667 is a wasteful number, since it uses less digits than its factorization.

6396938667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664643 (or 1664640 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 63.

The square root of 6396938667 is about 79980.8643801753. The cubic root of 6396938667 is about 1856.3394560433.

The spelling of 6396938667 in words is "six billion, three hundred ninety-six million, nine hundred thirty-eight thousand, six hundred sixty-seven".