78789514687 has 16 divisors (see below), whose sum is σ = 85591709280. Its totient is φ = 72094464000.

The previous prime is 78789514669. The next prime is 78789514747. The reversal of 78789514687 is 78641598787.

It is not a de Polignac number, because 78789514687 - 2³⁵ = 44429776319 is a prime.

It is a super-2 number, since 2×78789514687² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78789514187) 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 15 ways as a sum of consecutive naturals, for example, 1557187 + ... + 1606987.

It is an arithmetic number, because the mean of its divisors is an integer number (5349481830).

Almost surely, 2^78789514687 is an apocalyptic number.

78789514687 is a deficient number, since it is larger than the sum of its proper divisors (6802194593).

78789514687 is a wasteful number, since it uses less digits than its factorization.

78789514687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50874.

The product of its digits is 189665280, while the sum is 70.

The spelling of 78789514687 in words is "seventy-eight billion, seven hundred eighty-nine million, five hundred fourteen thousand, six hundred eighty-seven".