38678653554421 has 2 divisors, whose sum is σ = 38678653554422. Its totient is φ = 38678653554420.

The previous prime is 38678653554347. The next prime is 38678653554449. The reversal of 38678653554421 is 12445535687683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37751070756100 + 927582798321 = 6144190^2 + 963111^2 .

It is a cyclic number.

It is not a de Polignac number, because 38678653554421 - 2¹⁷ = 38678653423349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38678653554481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339326777210 + 19339326777211.

It is an arithmetic number, because the mean of its divisors is an integer number (19339326777211).

Almost surely, 2^{38678653554421} is an apocalyptic number.

It is an amenable number.

38678653554421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678653554421 is an equidigital number, since it uses as much as digits as its factorization.

38678653554421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608000, while the sum is 67.

The spelling of 38678653554421 in words is "thirty-eight trillion, six hundred seventy-eight billion, six hundred fifty-three million, five hundred fifty-four thousand, four hundred twenty-one".