63828688638 has 64 divisors (see below), whose sum is σ = 151120214784. Its totient is φ = 17717856000.

The previous prime is 63828688633. The next prime is 63828688643. The reversal of 63828688638 is 83688682836.

It is an interprime number because it is at equal distance from previous prime (63828688633) and next prime (63828688643).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63828688633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171543 + ... + 396338.

It is an arithmetic number, because the mean of its divisors is an integer number (2361253356).

Almost surely, 2^63828688638 is an apocalyptic number.

63828688638 is an abundant number, since it is smaller than the sum of its proper divisors (87291526146).

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

63828688638 is a wasteful number, since it uses less digits than its factorization.

63828688638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568041.

The product of its digits is 127401984, while the sum is 66.

The spelling of 63828688638 in words is "sixty-three billion, eight hundred twenty-eight million, six hundred eighty-eight thousand, six hundred thirty-eight".