78641014687 has 4 divisors (see below), whose sum is σ = 82780015480. Its totient is φ = 74502013896.

The previous prime is 78641014643. The next prime is 78641014709.

78641014687 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78641014687 - 2¹⁵ = 78640981919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78641714687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069500368 + ... + 2069500405.

It is an arithmetic number, because the mean of its divisors is an integer number (20695003870).

Almost surely, 2^78641014687 is an apocalyptic number.

78641014687 is a deficient number, since it is larger than the sum of its proper divisors (4139000793).

78641014687 is a wasteful number, since it uses less digits than its factorization.

78641014687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139000792.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 78641014687 in words is "seventy-eight billion, six hundred forty-one million, fourteen thousand, six hundred eighty-seven".