78865160197 has 4 divisors (see below), whose sum is σ = 78872933440. Its totient is φ = 78857386956.

The previous prime is 78865160141. The next prime is 78865160243. The reversal of 78865160197 is 79106156887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78865160197 - 2³¹ = 76717676549 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 (78865160137) 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 3 ways as a sum of consecutive naturals, for example, 3871383 + ... + 3891700.

It is an arithmetic number, because the mean of its divisors is an integer number (19718233360).

Almost surely, 2^78865160197 is an apocalyptic number.

It is an amenable number.

78865160197 is a deficient number, since it is larger than the sum of its proper divisors (7773243).

78865160197 is a wasteful number, since it uses less digits than its factorization.

78865160197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773242.

The product of its (nonzero) digits is 5080320, while the sum is 58.

It can be divided in two parts, 788651 and 60197, that added together give a palindrome (848848).

The spelling of 78865160197 in words is "seventy-eight billion, eight hundred sixty-five million, one hundred sixty thousand, one hundred ninety-seven".