38890385421487 has 2 divisors, whose sum is σ = 38890385421488. Its totient is φ = 38890385421486.

The previous prime is 38890385421469. The next prime is 38890385421491. The reversal of 38890385421487 is 78412458309883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38890385421487 - 2⁷ = 38890385421359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38890385424487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19445192710743 + 19445192710744.

It is an arithmetic number, because the mean of its divisors is an integer number (19445192710744).

Almost surely, 2^{38890385421487} is an apocalyptic number.

38890385421487 is a deficient number, since it is larger than the sum of its proper divisors (1).

38890385421487 is an equidigital number, since it uses as much as digits as its factorization.

38890385421487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 371589120, while the sum is 70.

The spelling of 38890385421487 in words is "thirty-eight trillion, eight hundred ninety billion, three hundred eighty-five million, four hundred twenty-one thousand, four hundred eighty-seven".