78710278457 has 8 divisors (see below), whose sum is σ = 81453936000. Its totient is φ = 75968588304.

The previous prime is 78710278417. The next prime is 78710278463. The reversal of 78710278457 is 75487201787.

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

It is a cyclic number.

It is not a de Polignac number, because 78710278457 - 2²⁰ = 78709229881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78710278417) 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, 410207 + ... + 570692.

It is an arithmetic number, because the mean of its divisors is an integer number (10181742000).

Almost surely, 2^78710278457 is an apocalyptic number.

It is an amenable number.

78710278457 is a deficient number, since it is larger than the sum of its proper divisors (2743657543).

78710278457 is a wasteful number, since it uses less digits than its factorization.

78710278457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983695.

The product of its (nonzero) digits is 6146560, while the sum is 56.

The spelling of 78710278457 in words is "seventy-eight billion, seven hundred ten million, two hundred seventy-eight thousand, four hundred fifty-seven".