3765728639 has 2 divisors, whose sum is σ = 3765728640. Its totient is φ = 3765728638.

The previous prime is 3765728623. The next prime is 3765728641. The reversal of 3765728639 is 9368275673.

It is a happy number.

3765728639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (9368275673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3765728639 - 2⁴ = 3765728623 is a prime.

Together with 3765728641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3765728609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1882864319 + 1882864320.

It is an arithmetic number, because the mean of its divisors is an integer number (1882864320).

Almost surely, 2^3765728639 is an apocalyptic number.

3765728639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3765728639 is an equidigital number, since it uses as much as digits as its factorization.

3765728639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 56.

The square root of 3765728639 is about 61365.5329888041. The cubic root of 3765728639 is about 1555.7853360166.

The spelling of 3765728639 in words is "three billion, seven hundred sixty-five million, seven hundred twenty-eight thousand, six hundred thirty-nine".