239779428865 has 16 divisors (see below), whose sum is σ = 289248448896. Its totient is φ = 190816905600.

The previous prime is 239779428859. The next prime is 239779428869. The reversal of 239779428865 is 568824977932.

It is not a de Polignac number, because 239779428865 - 2⁹ = 239779428353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239779428794 and 239779428803.

It is not an unprimeable number, because it can be changed into a prime (239779428869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776725 + ... + 1040605.

It is an arithmetic number, because the mean of its divisors is an integer number (18078028056).

Almost surely, 2^239779428865 is an apocalyptic number.

It is an amenable number.

239779428865 is a deficient number, since it is larger than the sum of its proper divisors (49469020031).

239779428865 is a wasteful number, since it uses less digits than its factorization.

239779428865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264840.

The product of its digits is 365783040, while the sum is 70.

The spelling of 239779428865 in words is "two hundred thirty-nine billion, seven hundred seventy-nine million, four hundred twenty-eight thousand, eight hundred sixty-five".