78571792865 has 8 divisors (see below), whose sum is σ = 94634072448. Its totient is φ = 62625486960.

The previous prime is 78571792841. The next prime is 78571792889. The reversal of 78571792865 is 56829717587.

It is an interprime number because it is at equal distance from previous prime (78571792841) and next prime (78571792889).

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

It is not a de Polignac number, because 78571792865 - 2¹⁰ = 78571791841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28991927 + ... + 28994636.

It is an arithmetic number, because the mean of its divisors is an integer number (11829259056).

Almost surely, 2^78571792865 is an apocalyptic number.

It is an amenable number.

78571792865 is a deficient number, since it is larger than the sum of its proper divisors (16062279583).

78571792865 is a wasteful number, since it uses less digits than its factorization.

78571792865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57986839.

The product of its digits is 59270400, while the sum is 65.

The spelling of 78571792865 in words is "seventy-eight billion, five hundred seventy-one million, seven hundred ninety-two thousand, eight hundred sixty-five".