6421323415 has 16 divisors (see below), whose sum is σ = 8566016256. Its totient is φ = 4588934400.

The previous prime is 6421323413. The next prime is 6421323439. The reversal of 6421323415 is 5143231246.

It is not a de Polignac number, because 6421323415 - 2¹ = 6421323413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421323413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1591366 + ... + 1595395.

It is an arithmetic number, because the mean of its divisors is an integer number (535376016).

Almost surely, 2^6421323415 is an apocalyptic number.

6421323415 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6421323415 is a deficient number, since it is larger than the sum of its proper divisors (2144692841).

6421323415 is a wasteful number, since it uses less digits than its factorization.

6421323415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186810.

The product of its digits is 17280, while the sum is 31.

The square root of 6421323415 is about 80133.1605204737. The cubic root of 6421323415 is about 1858.6952169327.

The spelling of 6421323415 in words is "six billion, four hundred twenty-one million, three hundred twenty-three thousand, four hundred fifteen".