78437073487 has 4 divisors (see below), whose sum is σ = 80967301696. Its totient is φ = 75906845280.

The previous prime is 78437073467. The next prime is 78437073493.

78437073487 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 78437073487 - 2²³ = 78428684879 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 (78437073467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265114058 + ... + 1265114119.

It is an arithmetic number, because the mean of its divisors is an integer number (20241825424).

Almost surely, 2^78437073487 is an apocalyptic number.

78437073487 is a deficient number, since it is larger than the sum of its proper divisors (2530228209).

78437073487 is a wasteful number, since it uses less digits than its factorization.

78437073487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530228208.

The product of its (nonzero) digits is 22127616, while the sum is 58.

The spelling of 78437073487 in words is "seventy-eight billion, four hundred thirty-seven million, seventy-three thousand, four hundred eighty-seven".