6396838477 has 4 divisors (see below), whose sum is σ = 6399977760. Its totient is φ = 6393699196.

The previous prime is 6396838463. The next prime is 6396838501. The reversal of 6396838477 is 7748386936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6396838477 - 2¹⁹ = 6396314189 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 (6396838447) 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, 1566583 + ... + 1570660.

It is an arithmetic number, because the mean of its divisors is an integer number (1599994440).

Almost surely, 2^6396838477 is an apocalyptic number.

It is an amenable number.

6396838477 is a deficient number, since it is larger than the sum of its proper divisors (3139283).

6396838477 is a wasteful number, since it uses less digits than its factorization.

6396838477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139282.

The product of its digits is 36578304, while the sum is 61.

The square root of 6396838477 is about 79980.2380404060. The cubic root of 6396838477 is about 1856.3297645522.

The spelling of 6396838477 in words is "six billion, three hundred ninety-six million, eight hundred thirty-eight thousand, four hundred seventy-seven".