78497079487 has 4 divisors (see below), whose sum is σ = 78519568536. Its totient is φ = 78474590440.

The previous prime is 78497079481. The next prime is 78497079491.

78497079487 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 78497079487 - 2⁷ = 78497079359 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 (78497079481) 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, 11239288 + ... + 11246269.

It is an arithmetic number, because the mean of its divisors is an integer number (19629892134).

Almost surely, 2^78497079487 is an apocalyptic number.

78497079487 is a deficient number, since it is larger than the sum of its proper divisors (22489049).

78497079487 is a wasteful number, since it uses less digits than its factorization.

78497079487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22489048.

The product of its (nonzero) digits is 199148544, while the sum is 70.

The spelling of 78497079487 in words is "seventy-eight billion, four hundred ninety-seven million, seventy-nine thousand, four hundred eighty-seven".