78799228469639 has 4 divisors (see below), whose sum is σ = 78815786412720. Its totient is φ = 78782670526560.

The previous prime is 78799228469623. The next prime is 78799228469677. The reversal of 78799228469639 is 93696482299787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78799228469639 - 2⁴ = 78799228469623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78799228459639) 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, 8278964402 + ... + 8278973919.

It is an arithmetic number, because the mean of its divisors is an integer number (19703946603180).

Almost surely, 2^{78799228469639} is an apocalyptic number.

78799228469639 is a deficient number, since it is larger than the sum of its proper divisors (16557943081).

78799228469639 is a wasteful number, since it uses less digits than its factorization.

78799228469639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16557943080.

The product of its digits is 35554111488, while the sum is 89.

The spelling of 78799228469639 in words is "seventy-eight trillion, seven hundred ninety-nine billion, two hundred twenty-eight million, four hundred sixty-nine thousand, six hundred thirty-nine".