288128308613 has 4 divisors (see below), whose sum is σ = 288129382380. Its totient is φ = 288127234848.

The previous prime is 288128308603. The next prime is 288128308619. The reversal of 288128308613 is 316803821882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 316803821882 = 2 ⋅158401910941.

It can be written as a sum of positive squares in 2 ways, for example, as 263094107329 + 25034201284 = 512927^2 + 158222^2 .

It is a cyclic number.

It is not a de Polignac number, because 288128308613 - 2¹⁰ = 288128307589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288128308619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252353 + ... + 799961.

It is an arithmetic number, because the mean of its divisors is an integer number (72032345595).

Almost surely, 2^288128308613 is an apocalyptic number.

It is an amenable number.

288128308613 is a deficient number, since it is larger than the sum of its proper divisors (1073767).

288128308613 is an equidigital number, since it uses as much as digits as its factorization.

288128308613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073766.

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 288128308613 in words is "two hundred eighty-eight billion, one hundred twenty-eight million, three hundred eight thousand, six hundred thirteen".