6128888138 has 4 divisors (see below), whose sum is σ = 9193332210. Its totient is φ = 3064444068.

The previous prime is 6128888137. The next prime is 6128888149. The reversal of 6128888138 is 8318888216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5717325769 + 411562369 = 75613^2 + 20287^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6128888138.

It is not an unprimeable number, because it can be changed into a prime (6128888137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1532222033 + ... + 1532222036.

Almost surely, 2^6128888138 is an apocalyptic number.

6128888138 is a deficient number, since it is larger than the sum of its proper divisors (3064444072).

6128888138 is a wasteful number, since it uses less digits than its factorization.

6128888138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064444071.

The product of its digits is 1179648, while the sum is 53.

The square root of 6128888138 is about 78287.2156740805. The cubic root of 6128888138 is about 1830.0399264682.

The spelling of 6128888138 in words is "six billion, one hundred twenty-eight million, eight hundred eighty-eight thousand, one hundred thirty-eight".