78787678787 has 8 divisors (see below), whose sum is σ = 79361419200. Its totient is φ = 78214037544.

The previous prime is 78787678759. The next prime is 78787678867.

78787678787 is nontrivially palindromic in base 10.

78787678787 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 78787678787 - 2¹⁶ = 78787613251 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78787674787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2494508 + ... + 2525894.

It is an arithmetic number, because the mean of its divisors is an integer number (9920177400).

Almost surely, 2^78787678787 is an apocalyptic number.

78787678787 is a deficient number, since it is larger than the sum of its proper divisors (573740413).

78787678787 is a wasteful number, since it uses less digits than its factorization.

78787678787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49585.

The product of its digits is 2891341824, while the sum is 80.

The spelling of 78787678787 in words is "seventy-eight billion, seven hundred eighty-seven million, six hundred seventy-eight thousand, seven hundred eighty-seven".