38107128618 has 80 divisors (see below), whose sum is σ = 92053823400. Its totient is φ = 11712864384.

The previous prime is 38107128589. The next prime is 38107128629. The reversal of 38107128618 is 81682170183.

It is a happy number.

38107128618 is a `hidden beast` number, since 3 + 8 + 1 + 0 + 7 + 1 + 28 + 618 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29435235489 + 8671893129 = 171567^2 + 93123^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2090608 + ... + 2108756.

Almost surely, 2^38107128618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38107128618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46026911700).

38107128618 is an abundant number, since it is smaller than the sum of its proper divisors (53946694782).

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

38107128618 is a wasteful number, since it uses less digits than its factorization.

38107128618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173 (or 19164 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 38107128618 in words is "thirty-eight billion, one hundred seven million, one hundred twenty-eight thousand, six hundred eighteen".