78260518593 has 12 divisors (see below), whose sum is σ = 114043353060. Its totient is φ = 51711964416.

The previous prime is 78260518573. The next prime is 78260518613. The reversal of 78260518593 is 39581506287.

78260518593 is a `hidden beast` number, since 78 + 2 + 6 + 0 + 518 + 59 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (78260518573) and next prime (78260518613).

It can be written as a sum of positive squares in 2 ways, for example, as 2168951184 + 76091567409 = 46572^2 + 275847^2 .

It is not a de Polignac number, because 78260518593 - 2⁵ = 78260518561 is a prime.

It is a super-2 number, since 2×78260518593² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78260518573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38475148 + ... + 38477181.

It is an arithmetic number, because the mean of its divisors is an integer number (9503612755).

Almost surely, 2^78260518593 is an apocalyptic number.

It is an amenable number.

78260518593 is a deficient number, since it is larger than the sum of its proper divisors (35782834467).

78260518593 is a wasteful number, since it uses less digits than its factorization.

78260518593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76952448 (or 76952445 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 78260518593 in words is "seventy-eight billion, two hundred sixty million, five hundred eighteen thousand, five hundred ninety-three".