38678880643829 has 2 divisors, whose sum is σ = 38678880643830. Its totient is φ = 38678880643828.

The previous prime is 38678880643759. The next prime is 38678880643853. The reversal of 38678880643829 is 92834608887683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33275938360900 + 5402942282929 = 5768530^2 + 2324423^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678880643829 - 2¹² = 38678880639733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38678880603829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339440321914 + 19339440321915.

It is an arithmetic number, because the mean of its divisors is an integer number (19339440321915).

Almost surely, 2^{38678880643829} is an apocalyptic number.

It is an amenable number.

38678880643829 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678880643829 is an equidigital number, since it uses as much as digits as its factorization.

38678880643829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5350883328, while the sum is 80.

The spelling of 38678880643829 in words is "thirty-eight trillion, six hundred seventy-eight billion, eight hundred eighty million, six hundred forty-three thousand, eight hundred twenty-nine".