6446478383 has 4 divisors (see below), whose sum is σ = 6459143880. Its totient is φ = 6433812888.

The previous prime is 6446478377. The next prime is 6446478461. The reversal of 6446478383 is 3838746446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6446478383 - 2²⁶ = 6379369519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446478323) 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, 6331985 + ... + 6333002.

It is an arithmetic number, because the mean of its divisors is an integer number (1614785970).

Almost surely, 2^6446478383 is an apocalyptic number.

6446478383 is a deficient number, since it is larger than the sum of its proper divisors (12665497).

6446478383 is a wasteful number, since it uses less digits than its factorization.

6446478383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665496.

The product of its digits is 9289728, while the sum is 53.

The square root of 6446478383 is about 80289.9643978001. The cubic root of 6446478383 is about 1861.1191460204.

The spelling of 6446478383 in words is "six billion, four hundred forty-six million, four hundred seventy-eight thousand, three hundred eighty-three".