78530807457817 has 8 divisors (see below), whose sum is σ = 92259969600960. Its totient is φ = 65899978286160.

The previous prime is 78530807457799. The next prime is 78530807457881. The reversal of 78530807457817 is 71875470803587.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78530807457817 - 2³⁵ = 78496447719449 is a prime.

It is a super-2 number, since 2×78530807457817² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78530807457887) 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, 274583242717 + ... + 274583243002.

It is an arithmetic number, because the mean of its divisors is an integer number (11532496200120).

Almost surely, 2^{78530807457817} is an apocalyptic number.

It is an amenable number.

78530807457817 is a deficient number, since it is larger than the sum of its proper divisors (13729162143143).

78530807457817 is a wasteful number, since it uses less digits than its factorization.

78530807457817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549166485743.

The product of its (nonzero) digits is 368793600, while the sum is 70.

The spelling of 78530807457817 in words is "seventy-eight trillion, five hundred thirty billion, eight hundred seven million, four hundred fifty-seven thousand, eight hundred seventeen".