78504383077717 has 8 divisors (see below), whose sum is σ = 78650976174624. Its totient is φ = 78357815349648.

The previous prime is 78504383077693. The next prime is 78504383077763. The reversal of 78504383077717 is 71777038340587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78504383077717 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 (78504383077117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141738 + ... + 12531115.

It is an arithmetic number, because the mean of its divisors is an integer number (9831372021828).

Almost surely, 2^{78504383077717} is an apocalyptic number.

It is an amenable number.

78504383077717 is a deficient number, since it is larger than the sum of its proper divisors (146593096907).

78504383077717 is a wasteful number, since it uses less digits than its factorization.

78504383077717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684419.

The product of its (nonzero) digits is 193616640, while the sum is 67.

The spelling of 78504383077717 in words is "seventy-eight trillion, five hundred four billion, three hundred eighty-three million, seventy-seven thousand, seven hundred seventeen".