78585795415 has 4 divisors (see below), whose sum is σ = 94302954504. Its totient is φ = 62868636328.

The previous prime is 78585795413. The next prime is 78585795437. The reversal of 78585795415 is 51459758587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51459758587 = 229 ⋅224715103.

It is a cyclic number.

It is not a de Polignac number, because 78585795415 - 2¹ = 78585795413 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 (78585795413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7858579537 + ... + 7858579546.

It is an arithmetic number, because the mean of its divisors is an integer number (23575738626).

Almost surely, 2^78585795415 is an apocalyptic number.

78585795415 is a deficient number, since it is larger than the sum of its proper divisors (15717159089).

78585795415 is a wasteful number, since it uses less digits than its factorization.

78585795415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15717159088.

The product of its digits is 70560000, while the sum is 64.

The spelling of 78585795415 in words is "seventy-eight billion, five hundred eighty-five million, seven hundred ninety-five thousand, four hundred fifteen".