239903978536 has 16 divisors (see below), whose sum is σ = 465330993300. Its totient is φ = 115815713664.

The previous prime is 239903978491. The next prime is 239903978537. The reversal of 239903978536 is 635879309932.

239903978536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 239855062500 + 48916036 = 489750^2 + 6994^2 .

It is not an unprimeable number, because it can be changed into a prime (239903978537) 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 in 3 ways as a sum of consecutive naturals, for example, 517034205 + ... + 517034668.

Almost surely, 2^239903978536 is an apocalyptic number.

It is an amenable number.

239903978536 is a deficient number, since it is larger than the sum of its proper divisors (225427014764).

239903978536 is a wasteful number, since it uses less digits than its factorization.

239903978536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034068908 (or 1034068904 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 64.

The spelling of 239903978536 in words is "two hundred thirty-nine billion, nine hundred three million, nine hundred seventy-eight thousand, five hundred thirty-six".