78073364687 has 4 divisors (see below), whose sum is σ = 79977593136. Its totient is φ = 76169136240.

The previous prime is 78073364659. The next prime is 78073364777. The reversal of 78073364687 is 78646337087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78646337087 = 47 ⋅1673326321.

It is a cyclic number.

It is not a de Polignac number, because 78073364687 - 2¹⁰ = 78073363663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78073364647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952114163 + ... + 952114244.

It is an arithmetic number, because the mean of its divisors is an integer number (19994398284).

Almost surely, 2^78073364687 is an apocalyptic number.

78073364687 is a deficient number, since it is larger than the sum of its proper divisors (1904228449).

78073364687 is a wasteful number, since it uses less digits than its factorization.

78073364687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904228448.

The product of its (nonzero) digits is 28449792, while the sum is 59.

The spelling of 78073364687 in words is "seventy-eight billion, seventy-three million, three hundred sixty-four thousand, six hundred eighty-seven".