6386432749638 has 16 divisors (see below), whose sum is σ = 12783309394176. Its totient is φ = 2127070267400.

The previous prime is 6386432749633. The next prime is 6386432749643. The reversal of 6386432749638 is 8369472346836.

It is an interprime number because it is at equal distance from previous prime (6386432749633) and next prime (6386432749643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6386432749633) 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, 435154338 + ... + 435169013.

It is an arithmetic number, because the mean of its divisors is an integer number (798956837136).

Almost surely, 2^{6386432749638} is an apocalyptic number.

6386432749638 is an abundant number, since it is smaller than the sum of its proper divisors (6396876644538).

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

6386432749638 is a wasteful number, since it uses less digits than its factorization.

6386432749638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870324579.

The product of its digits is 752467968, while the sum is 69.

The spelling of 6386432749638 in words is "six trillion, three hundred eighty-six billion, four hundred thirty-two million, seven hundred forty-nine thousand, six hundred thirty-eight".