38765855817 has 12 divisors (see below), whose sum is σ = 60302442564. Its totient is φ = 23855911200.

The previous prime is 38765855809. The next prime is 38765855827. The reversal of 38765855817 is 71855856783.

38765855817 is a `hidden beast` number, since 3 + 8 + 7 + 65 + 8 + 558 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15331144761 + 23434711056 = 123819^2 + 153084^2 .

It is not a de Polignac number, because 38765855817 - 2³ = 38765855809 is a prime.

It is a super-3 number, since 3×38765855817³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (38765855827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165665934 + ... + 165666167.

It is an arithmetic number, because the mean of its divisors is an integer number (5025203547).

Almost surely, 2^38765855817 is an apocalyptic number.

It is an amenable number.

38765855817 is a deficient number, since it is larger than the sum of its proper divisors (21536586747).

38765855817 is a wasteful number, since it uses less digits than its factorization.

38765855817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331332120 (or 331332117 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 63.

The spelling of 38765855817 in words is "thirty-eight billion, seven hundred sixty-five million, eight hundred fifty-five thousand, eight hundred seventeen".