38851955887 has 2 divisors, whose sum is σ = 38851955888. Its totient is φ = 38851955886.

The previous prime is 38851955881. The next prime is 38851955897. The reversal of 38851955887 is 78855915883.

38851955887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (78855915883) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38851955887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38851955881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19425977943 + 19425977944.

It is an arithmetic number, because the mean of its divisors is an integer number (19425977944).

Almost surely, 2^38851955887 is an apocalyptic number.

38851955887 is a deficient number, since it is larger than the sum of its proper divisors (1).

38851955887 is an equidigital number, since it uses as much as digits as its factorization.

38851955887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768000, while the sum is 67.

The spelling of 38851955887 in words is "thirty-eight billion, eight hundred fifty-one million, nine hundred fifty-five thousand, eight hundred eighty-seven".