6397920621224 has 32 divisors (see below), whose sum is σ = 13537919815200. Its totient is φ = 2807864848320.

The previous prime is 6397920621221. The next prime is 6397920621241. The reversal of 6397920621224 is 4221260297936.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6397920621221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253508542 + ... + 1253513645.

It is an arithmetic number, because the mean of its divisors is an integer number (423059994225).

Almost surely, 2^{6397920621224} is an apocalyptic number.

It is an amenable number.

6397920621224 is an abundant number, since it is smaller than the sum of its proper divisors (7139999193976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6397920621224 is a wasteful number, since it uses less digits than its factorization.

6397920621224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507022233 (or 2507022229 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 6397920621224 in words is "six trillion, three hundred ninety-seven billion, nine hundred twenty million, six hundred twenty-one thousand, two hundred twenty-four".