78738949239 has 16 divisors (see below), whose sum is σ = 107011448544. Its totient is φ = 51487488000.

The previous prime is 78738949231. The next prime is 78738949241. The reversal of 78738949239 is 93294983787.

It is not a de Polignac number, because 78738949239 - 2³ = 78738949231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78738949231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953562 + ... + 1032839.

It is an arithmetic number, because the mean of its divisors is an integer number (6688215534).

Almost surely, 2^78738949239 is an apocalyptic number.

78738949239 is a deficient number, since it is larger than the sum of its proper divisors (28272499305).

78738949239 is a wasteful number, since it uses less digits than its factorization.

78738949239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986658.

The product of its digits is 164602368, while the sum is 69.

The spelling of 78738949239 in words is "seventy-eight billion, seven hundred thirty-eight million, nine hundred forty-nine thousand, two hundred thirty-nine".