78978763159 has 4 divisors (see below), whose sum is σ = 79101975600. Its totient is φ = 78855550720.

The previous prime is 78978763153. The next prime is 78978763273. The reversal of 78978763159 is 95136787987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78978763159 - 2²⁹ = 78441892247 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 (78978763153) 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, 61605259 + ... + 61606540.

It is an arithmetic number, because the mean of its divisors is an integer number (19775493900).

Almost surely, 2^78978763159 is an apocalyptic number.

78978763159 is a deficient number, since it is larger than the sum of its proper divisors (123212441).

78978763159 is a wasteful number, since it uses less digits than its factorization.

78978763159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123212440.

The product of its digits is 160030080, while the sum is 70.

The spelling of 78978763159 in words is "seventy-eight billion, nine hundred seventy-eight million, seven hundred sixty-three thousand, one hundred fifty-nine".