6421875099 has 8 divisors (see below), whose sum is σ = 8562914112. Its totient is φ = 4281043080.

The previous prime is 6421875079. The next prime is 6421875107. The reversal of 6421875099 is 9905781246.

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

It is not a de Polignac number, because 6421875099 - 2⁷ = 6421874971 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6421875049) 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, 48252 + ... + 123174.

It is an arithmetic number, because the mean of its divisors is an integer number (1070364264).

Almost surely, 2^6421875099 is an apocalyptic number.

6421875099 is a deficient number, since it is larger than the sum of its proper divisors (2141039013).

6421875099 is a wasteful number, since it uses less digits than its factorization.

6421875099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103497.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 6421875099 is about 80136.6027418183. The cubic root of 6421875099 is about 1858.7484449555.

The spelling of 6421875099 in words is "six billion, four hundred twenty-one million, eight hundred seventy-five thousand, ninety-nine".