38775127891 has 2 divisors, whose sum is σ = 38775127892. Its totient is φ = 38775127890.

The previous prime is 38775127889. The next prime is 38775127913. The reversal of 38775127891 is 19872157783.

It is a weak prime.

It is an emirp because it is prime and its reverse (19872157783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38775127891 - 2¹ = 38775127889 is a prime.

It is a super-2 number, since 2×38775127891² (a number of 22 digits) contains 22 as substring.

Together with 38775127889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38775127801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19387563945 + 19387563946.

It is an arithmetic number, because the mean of its divisors is an integer number (19387563946).

Almost surely, 2^38775127891 is an apocalyptic number.

38775127891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38775127891 is an equidigital number, since it uses as much as digits as its factorization.

38775127891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 58.

The spelling of 38775127891 in words is "thirty-eight billion, seven hundred seventy-five million, one hundred twenty-seven thousand, eight hundred ninety-one".