6424401993 has 8 divisors (see below), whose sum is σ = 8569388256. Its totient is φ = 4281175200.

The previous prime is 6424401989. The next prime is 6424402003. The reversal of 6424401993 is 3991044246.

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

It is not a de Polignac number, because 6424401993 - 2² = 6424401989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6424401913) 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, 431323 + ... + 445968.

It is an arithmetic number, because the mean of its divisors is an integer number (1071173532).

Almost surely, 2^6424401993 is an apocalyptic number.

It is an amenable number.

6424401993 is a deficient number, since it is larger than the sum of its proper divisors (2144986263).

6424401993 is a wasteful number, since it uses less digits than its factorization.

6424401993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879735.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 6424401993 is about 80152.3673574274. The cubic root of 6424401993 is about 1858.9922078395.

The spelling of 6424401993 in words is "six billion, four hundred twenty-four million, four hundred one thousand, nine hundred ninety-three".