38994491761987 has 2 divisors, whose sum is σ = 38994491761988. Its totient is φ = 38994491761986.

The previous prime is 38994491761957. The next prime is 38994491761999. The reversal of 38994491761987 is 78916719449983.

38994491761987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38994491761987 - 2¹¹ = 38994491759939 is a prime.

It is not a weakly prime, because it can be changed into another prime (38994491761957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19497245880993 + 19497245880994.

It is an arithmetic number, because the mean of its divisors is an integer number (19497245880994).

Almost surely, 2^{38994491761987} is an apocalyptic number.

38994491761987 is a deficient number, since it is larger than the sum of its proper divisors (1).

38994491761987 is an equidigital number, since it uses as much as digits as its factorization.

38994491761987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5925685248, while the sum is 85.

The spelling of 38994491761987 in words is "thirty-eight trillion, nine hundred ninety-four billion, four hundred ninety-one million, seven hundred sixty-one thousand, nine hundred eighty-seven".