38539491919 has 2 divisors, whose sum is σ = 38539491920. Its totient is φ = 38539491918.

The previous prime is 38539491917. The next prime is 38539491923. The reversal of 38539491919 is 91919493583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38539491919 - 2¹ = 38539491917 is a prime.

It is a super-2 number, since 2×38539491919² (a number of 22 digits) contains 22 as substring.

Together with 38539491917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38539491917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269745959 + 19269745960.

It is an arithmetic number, because the mean of its divisors is an integer number (19269745960).

Almost surely, 2^38539491919 is an apocalyptic number.

38539491919 is a deficient number, since it is larger than the sum of its proper divisors (1).

38539491919 is an equidigital number, since it uses as much as digits as its factorization.

38539491919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 61.

The spelling of 38539491919 in words is "thirty-eight billion, five hundred thirty-nine million, four hundred ninety-one thousand, nine hundred nineteen".