78677944977687 has 16 divisors (see below), whose sum is σ = 114444765292800. Its totient is φ = 47681887161600.

The previous prime is 78677944977661. The next prime is 78677944977689.

78677944977687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78677944977687 - 2⁷ = 78677944977559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78677944977594 and 78677944977603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78677944977689) 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, 41965114 + ... + 43799847.

It is an arithmetic number, because the mean of its divisors is an integer number (7152797830800).

Almost surely, 2^{78677944977687} is an apocalyptic number.

78677944977687 is a deficient number, since it is larger than the sum of its proper divisors (35766820315113).

78677944977687 is a wasteful number, since it uses less digits than its factorization.

78677944977687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85792774.

The product of its digits is 351298031616, while the sum is 96.

The spelling of 78677944977687 in words is "seventy-eight trillion, six hundred seventy-seven billion, nine hundred forty-four million, nine hundred seventy-seven thousand, six hundred eighty-seven".