389136420863 has 32 divisors (see below), whose sum is σ = 404971828800. Its totient is φ = 373737701376.

The previous prime is 389136420811. The next prime is 389136420887. The reversal of 389136420863 is 368024631983.

It is a happy number.

It is a Cunningham number, because it is equal to 623808²-1.

It is a cyclic number.

It is not a de Polignac number, because 389136420863 - 2²⁶ = 389069311999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389136420763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195250595 + ... + 195252587.

It is an arithmetic number, because the mean of its divisors is an integer number (12655369650).

Almost surely, 2^389136420863 is an apocalyptic number.

389136420863 is a deficient number, since it is larger than the sum of its proper divisors (15835407937).

389136420863 is a wasteful number, since it uses less digits than its factorization.

389136420863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 389136420863 in words is "three hundred eighty-nine billion, one hundred thirty-six million, four hundred twenty thousand, eight hundred sixty-three".