38405021191 has 2 divisors, whose sum is σ = 38405021192. Its totient is φ = 38405021190.

The previous prime is 38405021159. The next prime is 38405021209. The reversal of 38405021191 is 19112050483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38405021191 - 2⁵ = 38405021159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38405021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19202510595 + 19202510596.

It is an arithmetic number, because the mean of its divisors is an integer number (19202510596).

Almost surely, 2^38405021191 is an apocalyptic number.

38405021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

38405021191 is an equidigital number, since it uses as much as digits as its factorization.

38405021191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 38405021191 in words is "thirty-eight billion, four hundred five million, twenty-one thousand, one hundred ninety-one".