6938145138 has 32 divisors (see below), whose sum is σ = 14077440000. Its totient is φ = 2279296656.

The previous prime is 6938145119. The next prime is 6938145139. The reversal of 6938145138 is 8315418396.

It is not an unprimeable number, because it can be changed into a prime (6938145139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253863 + ... + 279861.

It is an arithmetic number, because the mean of its divisors is an integer number (439920000).

Almost surely, 2^6938145138 is an apocalyptic number.

6938145138 is an abundant number, since it is smaller than the sum of its proper divisors (7139294862).

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

6938145138 is a wasteful number, since it uses less digits than its factorization.

6938145138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26646.

The product of its digits is 622080, while the sum is 48.

The square root of 6938145138 is about 83295.5289196245. The cubic root of 6938145138 is about 1907.2800239428.

It can be divided in two parts, 6938 and 145138, that added together give a triangular number (152076 = T₅₅₁).

The spelling of 6938145138 in words is "six billion, nine hundred thirty-eight million, one hundred forty-five thousand, one hundred thirty-eight".