6386438416 has 20 divisors (see below), whose sum is σ = 13101591132. Its totient is φ = 3005382656.

The previous prime is 6386438413. The next prime is 6386438437. The reversal of 6386438416 is 6148346836.

It can be written as a sum of positive squares in 2 ways, for example, as 4173676816 + 2212761600 = 64604^2 + 47040^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6386438416.

It is not an unprimeable number, because it can be changed into a prime (6386438411) 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, 11739505 + ... + 11740048.

Almost surely, 2^6386438416 is an apocalyptic number.

It is an amenable number.

6386438416 is an abundant number, since it is smaller than the sum of its proper divisors (6715152716).

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

6386438416 is a wasteful number, since it uses less digits than its factorization.

6386438416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23479578 (or 23479572 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 49.

The square root of 6386438416 is about 79915.1951508598. The cubic root of 6386438416 is about 1855.3232040493.

The spelling of 6386438416 in words is "six billion, three hundred eighty-six million, four hundred thirty-eight thousand, four hundred sixteen".