78479497487 has 4 divisors (see below), whose sum is σ = 78486278640. Its totient is φ = 78472716336.

The previous prime is 78479497477. The next prime is 78479497517.

78479497487 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 78479497487 - 2⁴ = 78479497471 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 (78479497417) 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, 3373187 + ... + 3396372.

It is an arithmetic number, because the mean of its divisors is an integer number (19621569660).

Almost surely, 2^78479497487 is an apocalyptic number.

78479497487 is a deficient number, since it is larger than the sum of its proper divisors (6781153).

78479497487 is a wasteful number, since it uses less digits than its factorization.

78479497487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781152.

The product of its digits is 796594176, while the sum is 74.

The spelling of 78479497487 in words is "seventy-eight billion, four hundred seventy-nine million, four hundred ninety-seven thousand, four hundred eighty-seven".