389155815399 has 32 divisors (see below), whose sum is σ = 588725562880. Its totient is φ = 226672670592.

The previous prime is 389155815397. The next prime is 389155815427. The reversal of 389155815399 is 993518551983.

It is not a de Polignac number, because 389155815399 - 2¹ = 389155815397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389155815397) 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, 592614 + ... + 1062780.

It is an arithmetic number, because the mean of its divisors is an integer number (18397673840).

Almost surely, 2^389155815399 is an apocalyptic number.

389155815399 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

389155815399 is a deficient number, since it is larger than the sum of its proper divisors (199569747481).

389155815399 is a wasteful number, since it uses less digits than its factorization.

389155815399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471319.

The product of its digits is 52488000, while the sum is 66.

The spelling of 389155815399 in words is "three hundred eighty-nine billion, one hundred fifty-five million, eight hundred fifteen thousand, three hundred ninety-nine".