38138464187 has 2 divisors, whose sum is σ = 38138464188. Its totient is φ = 38138464186.

The previous prime is 38138464181. The next prime is 38138464201. The reversal of 38138464187 is 78146483183.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38138464187 - 2⁸ = 38138463931 is a prime.

It is not a weakly prime, because it can be changed into another prime (38138464181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19069232093 + 19069232094.

It is an arithmetic number, because the mean of its divisors is an integer number (19069232094).

Almost surely, 2^38138464187 is an apocalyptic number.

38138464187 is a deficient number, since it is larger than the sum of its proper divisors (1).

38138464187 is an equidigital number, since it uses as much as digits as its factorization.

38138464187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 53.

The spelling of 38138464187 in words is "thirty-eight billion, one hundred thirty-eight million, four hundred sixty-four thousand, one hundred eighty-seven".