38688128550 has 48 divisors (see below), whose sum is σ = 106607291280. Its totient is φ = 10316833920.

The previous prime is 38688128527. The next prime is 38688128569. The reversal of 38688128550 is 5582188683.

It is a happy number.

38688128550 is a `hidden beast` number, since 3 + 8 + 6 + 8 + 81 + 2 + 8 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14327587 + ... + 14330286.

It is an arithmetic number, because the mean of its divisors is an integer number (2220985235).

Almost surely, 2^38688128550 is an apocalyptic number.

38688128550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38688128550 is an abundant number, since it is smaller than the sum of its proper divisors (67919162730).

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

38688128550 is a wasteful number, since it uses less digits than its factorization.

38688128550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28657894 (or 28657883 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 54.

The spelling of 38688128550 in words is "thirty-eight billion, six hundred eighty-eight million, one hundred twenty-eight thousand, five hundred fifty".