78491573079 has 8 divisors (see below), whose sum is σ = 107483956080. Its totient is φ = 50913452736.

The previous prime is 78491573053. The next prime is 78491573183. The reversal of 78491573079 is 97037519487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78491573079 - 2⁹ = 78491572567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78491573009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353565534 + ... + 353565755.

It is an arithmetic number, because the mean of its divisors is an integer number (13435494510).

Almost surely, 2^78491573079 is an apocalyptic number.

78491573079 is a deficient number, since it is larger than the sum of its proper divisors (28992383001).

78491573079 is a wasteful number, since it uses less digits than its factorization.

78491573079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707131329.

The product of its (nonzero) digits is 13335840, while the sum is 60.

The spelling of 78491573079 in words is "seventy-eight billion, four hundred ninety-one million, five hundred seventy-three thousand, seventy-nine".