78487677678487 has 16 divisors (see below), whose sum is σ = 98203004607744. Its totient is φ = 60941580840000.

The previous prime is 78487677678479. The next prime is 78487677678521.

78487677678487 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78487677678487 - 2³ = 78487677678479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78487677678395 and 78487677678404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78487677673487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1813715889 + ... + 1813759162.

It is an arithmetic number, because the mean of its divisors is an integer number (6137687787984).

Almost surely, 2^{78487677678487} is an apocalyptic number.

78487677678487 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78487677678487 is a deficient number, since it is larger than the sum of its proper divisors (19715326929257).

78487677678487 is a wasteful number, since it uses less digits than its factorization.

78487677678487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627475350.

The product of its digits is 277568815104, while the sum is 94.

The spelling of 78487677678487 in words is "seventy-eight trillion, four hundred eighty-seven billion, six hundred seventy-seven million, six hundred seventy-eight thousand, four hundred eighty-seven".