6397999646992 has 20 divisors (see below), whose sum is σ = 12397043034000. Its totient is φ = 3198762735008.

The previous prime is 6397999646977. The next prime is 6397999646999. The reversal of 6397999646992 is 2996469997936.

It is a super-2 number, since 2×6397999646992² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6397999646999) 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, 14595298 + ... + 15027265.

It is an arithmetic number, because the mean of its divisors is an integer number (619852151700).

Almost surely, 2^{6397999646992} is an apocalyptic number.

It is an amenable number.

6397999646992 is a deficient number, since it is larger than the sum of its proper divisors (5999043387008).

6397999646992 is a wasteful number, since it uses less digits than its factorization.

6397999646992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29636070 (or 29636064 counting only the distinct ones).

The product of its digits is 19284931008, while the sum is 88.

The spelling of 6397999646992 in words is "six trillion, three hundred ninety-seven billion, nine hundred ninety-nine million, six hundred forty-six thousand, nine hundred ninety-two".