6438320077 has 8 divisors (see below), whose sum is σ = 7537545792. Its totient is φ = 5383960800.

The previous prime is 6438320047. The next prime is 6438320081. The reversal of 6438320077 is 7700238346.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6438320077 - 2¹⁵ = 6438287309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438320047) 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, 11216299 + ... + 11216872.

It is an arithmetic number, because the mean of its divisors is an integer number (942193224).

Almost surely, 2^6438320077 is an apocalyptic number.

It is an amenable number.

6438320077 is a deficient number, since it is larger than the sum of its proper divisors (1099225715).

6438320077 is a wasteful number, since it uses less digits than its factorization.

6438320077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22433219.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 6438320077 is about 80239.1430475176. The cubic root of 6438320077 is about 1860.3337048195. Note that the first 3 decimals are identical.

The spelling of 6438320077 in words is "six billion, four hundred thirty-eight million, three hundred twenty thousand, seventy-seven".