38538579618 has 144 divisors (see below), whose sum is σ = 105074843328. Its totient is φ = 9992664000.

The previous prime is 38538579581. The next prime is 38538579647. The reversal of 38538579618 is 81697583583.

38538579618 is a `hidden beast` number, since 3 + 8 + 5 + 3 + 8 + 5 + 7 + 9 + 618 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10411168 + ... + 10414868.

It is an arithmetic number, because the mean of its divisors is an integer number (729686412).

Almost surely, 2^38538579618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38538579618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52537421664).

38538579618 is an abundant number, since it is smaller than the sum of its proper divisors (66536263710).

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

38538579618 is a wasteful number, since it uses less digits than its factorization.

38538579618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421 (or 4407 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 38538579618 in words is "thirty-eight billion, five hundred thirty-eight million, five hundred seventy-nine thousand, six hundred eighteen".