38955585756421 has 2 divisors, whose sum is σ = 38955585756422. Its totient is φ = 38955585756420.

The previous prime is 38955585756407. The next prime is 38955585756467. The reversal of 38955585756421 is 12465758555983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24079522453921 + 14876063302500 = 4907089^2 + 3856950^2 .

It is an emirp because it is prime and its reverse (12465758555983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38955585756421 - 2¹⁷ = 38955585625349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38955585753421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19477792878210 + 19477792878211.

It is an arithmetic number, because the mean of its divisors is an integer number (19477792878211).

Almost surely, 2^{38955585756421} is an apocalyptic number.

It is an amenable number.

38955585756421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38955585756421 is an equidigital number, since it uses as much as digits as its factorization.

38955585756421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400000, while the sum is 73.

The spelling of 38955585756421 in words is "thirty-eight trillion, nine hundred fifty-five billion, five hundred eighty-five million, seven hundred fifty-six thousand, four hundred twenty-one".