38678653366517 has 8 divisors (see below), whose sum is σ = 39312841185432. Its totient is φ = 38044469145600.

The previous prime is 38678653366477. The next prime is 38678653366531. The reversal of 38678653366517 is 71566335687683.

It can be written as a sum of positive squares in 4 ways, for example, as 706610041201 + 37972043325316 = 840601^2 + 6162146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38678653366517 is a prime.

It is a super-2 number, since 2×38678653366517² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38678653366547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28692917 + ... + 30010677.

It is an arithmetic number, because the mean of its divisors is an integer number (4914105148179).

Almost surely, 2^{38678653366517} is an apocalyptic number.

It is an amenable number.

38678653366517 is a deficient number, since it is larger than the sum of its proper divisors (634187818915).

38678653366517 is a wasteful number, since it uses less digits than its factorization.

38678653366517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798999.

The product of its digits is 2743372800, while the sum is 74.

The spelling of 38678653366517 in words is "thirty-eight trillion, six hundred seventy-eight billion, six hundred fifty-three million, three hundred sixty-six thousand, five hundred seventeen".