78504623841017 has 16 divisors (see below), whose sum is σ = 87105462912000. Its totient is φ = 70148141335440.

The previous prime is 78504623841001. The next prime is 78504623841019. The reversal of 78504623841017 is 71014832640587.

It is a cyclic number.

It is not a de Polignac number, because 78504623841017 - 2⁴ = 78504623841001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78504623841019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4159517 + ... + 13202682.

It is an arithmetic number, because the mean of its divisors is an integer number (5444091432000).

Almost surely, 2^{78504623841017} is an apocalyptic number.

It is an amenable number.

78504623841017 is a deficient number, since it is larger than the sum of its proper divisors (8600839070983).

78504623841017 is a wasteful number, since it uses less digits than its factorization.

78504623841017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17369236.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 78504623841017 in words is "seventy-eight trillion, five hundred four billion, six hundred twenty-three million, eight hundred forty-one thousand, seventeen".