78655855687 has 8 divisors (see below), whose sum is σ = 78727334400. Its totient is φ = 78584412984.

The previous prime is 78655855667. The next prime is 78655855703.

78655855687 is nontrivially palindromic in base 10.

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 78655855687 - 2²⁷ = 78521637959 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 (78655855667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6063114 + ... + 6076072.

It is an arithmetic number, because the mean of its divisors is an integer number (9840916800).

Almost surely, 2^78655855687 is an apocalyptic number.

78655855687 is a deficient number, since it is larger than the sum of its proper divisors (71478713).

78655855687 is a wasteful number, since it uses less digits than its factorization.

78655855687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005.

The product of its digits is 564480000, while the sum is 70.

The spelling of 78655855687 in words is "seventy-eight billion, six hundred fifty-five million, eight hundred fifty-five thousand, six hundred eighty-seven".