78697479687 has 16 divisors (see below), whose sum is σ = 114686272512. Its totient is φ = 47785944960.

The previous prime is 78697479659. The next prime is 78697479689.

78697479687 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78697479687 - 2¹⁰ = 78697478663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78697479689) 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, 24886933 + ... + 24890094.

It is an arithmetic number, because the mean of its divisors is an integer number (7167892032).

Almost surely, 2^78697479687 is an apocalyptic number.

78697479687 is a deficient number, since it is larger than the sum of its proper divisors (35988792825).

78697479687 is a wasteful number, since it uses less digits than its factorization.

78697479687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49777078.

The product of its digits is 1792336896, while the sum is 78.

The spelling of 78697479687 in words is "seventy-eight billion, six hundred ninety-seven million, four hundred seventy-nine thousand, six hundred eighty-seven".