78635988953687 has 16 divisors (see below), whose sum is σ = 86105086935840. Its totient is φ = 71220442675200.

The previous prime is 78635988953653. The next prime is 78635988953773.

It is a happy number.

78635988953687 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78635988953687 - 2⁴⁰ = 77536477325911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78635988953596 and 78635988953605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78635988913687) 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, 6150239 + ... + 13967727.

It is an arithmetic number, because the mean of its divisors is an integer number (5381567933490).

Almost surely, 2^{78635988953687} is an apocalyptic number.

78635988953687 is a deficient number, since it is larger than the sum of its proper divisors (7469097982153).

78635988953687 is a wasteful number, since it uses less digits than its factorization.

78635988953687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820914.

The product of its digits is 131681894400, while the sum is 92.

The spelling of 78635988953687 in words is "seventy-eight trillion, six hundred thirty-five billion, nine hundred eighty-eight million, nine hundred fifty-three thousand, six hundred eighty-seven".