78935844601 has 4 divisors (see below), whose sum is σ = 79138764900. Its totient is φ = 78732924304.

The previous prime is 78935844587. The next prime is 78935844683. The reversal of 78935844601 is 10644853987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10644853987 = 19 ⋅560255473.

It can be written as a sum of positive squares in 2 ways, for example, as 41339022400 + 37596822201 = 203320^2 + 193899^2 .

It is a cyclic number.

It is not a de Polignac number, because 78935844601 - 2¹³ = 78935836409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78935844101) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 101459566 + ... + 101460343.

It is an arithmetic number, because the mean of its divisors is an integer number (19784691225).

Almost surely, 2^78935844601 is an apocalyptic number.

It is an amenable number.

78935844601 is a deficient number, since it is larger than the sum of its proper divisors (202920299).

78935844601 is a wasteful number, since it uses less digits than its factorization.

78935844601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202920298.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 78935844601 in words is "seventy-eight billion, nine hundred thirty-five million, eight hundred forty-four thousand, six hundred one".