78898204717 has 4 divisors (see below), whose sum is σ = 79420709536. Its totient is φ = 78375699900.

The previous prime is 78898204711. The next prime is 78898204733. The reversal of 78898204717 is 71740289887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78898204717 - 2⁷ = 78898204589 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 (78898204711) 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 3 ways as a sum of consecutive naturals, for example, 261252183 + ... + 261252484.

It is an arithmetic number, because the mean of its divisors is an integer number (19855177384).

Almost surely, 2^78898204717 is an apocalyptic number.

It is an amenable number.

78898204717 is a deficient number, since it is larger than the sum of its proper divisors (522504819).

78898204717 is a wasteful number, since it uses less digits than its factorization.

78898204717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522504818.

The product of its (nonzero) digits is 12644352, while the sum is 61.

The spelling of 78898204717 in words is "seventy-eight billion, eight hundred ninety-eight million, two hundred four thousand, seven hundred seventeen".