78452425487 has 4 divisors (see below), whose sum is σ = 79051299096. Its totient is φ = 77853551880.

The previous prime is 78452425481. The next prime is 78452425517.

78452425487 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 78452425487 - 2²⁰ = 78451376911 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 (78452425481) 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, 299436608 + ... + 299436869.

It is an arithmetic number, because the mean of its divisors is an integer number (19762824774).

Almost surely, 2^78452425487 is an apocalyptic number.

78452425487 is a deficient number, since it is larger than the sum of its proper divisors (598873609).

78452425487 is a wasteful number, since it uses less digits than its factorization.

78452425487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598873608.

The product of its digits is 20070400, while the sum is 56.

The spelling of 78452425487 in words is "seventy-eight billion, four hundred fifty-two million, four hundred twenty-five thousand, four hundred eighty-seven".