78847291601 has 8 divisors (see below), whose sum is σ = 85038647400. Its totient is φ = 72673961472.

The previous prime is 78847291583. The next prime is 78847291639. The reversal of 78847291601 is 10619274887.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43573201 + 78803718400 = 6601^2 + 280720^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78847291601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78847291661) 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 7 ways as a sum of consecutive naturals, for example, 4497326 + ... + 4514823.

It is an arithmetic number, because the mean of its divisors is an integer number (10629830925).

Almost surely, 2^78847291601 is an apocalyptic number.

It is an amenable number.

78847291601 is a deficient number, since it is larger than the sum of its proper divisors (6191355799).

78847291601 is a wasteful number, since it uses less digits than its factorization.

78847291601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012835.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 78847291601 in words is "seventy-eight billion, eight hundred forty-seven million, two hundred ninety-one thousand, six hundred one".