38678630656117 has 2 divisors, whose sum is σ = 38678630656118. Its totient is φ = 38678630656116.

The previous prime is 38678630656103. The next prime is 38678630656123. The reversal of 38678630656117 is 71165603687683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38632179199441 + 46451456676 = 6215479^2 + 215526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38678630656117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38678630659117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339315328058 + 19339315328059.

It is an arithmetic number, because the mean of its divisors is an integer number (19339315328059).

Almost surely, 2^{38678630656117} is an apocalyptic number.

It is an amenable number.

38678630656117 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678630656117 is an equidigital number, since it uses as much as digits as its factorization.

38678630656117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 67.

The spelling of 38678630656117 in words is "thirty-eight trillion, six hundred seventy-eight billion, six hundred thirty million, six hundred fifty-six thousand, one hundred seventeen".