78470254017 has 6 divisors (see below), whose sum is σ = 113345922482. Its totient is φ = 52313502672.

The previous prime is 78470254003. The next prime is 78470254021. The reversal of 78470254017 is 71045207487.

It can be written as a sum of positive squares in only one way, i.e., 73790462736 + 4679791281 = 271644^2 + 68409^2 .

It is not a de Polignac number, because 78470254017 - 2³⁴ = 61290384833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78470254417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4359458548 + ... + 4359458565.

Almost surely, 2^78470254017 is an apocalyptic number.

It is an amenable number.

78470254017 is a deficient number, since it is larger than the sum of its proper divisors (34875668465).

78470254017 is a wasteful number, since it uses less digits than its factorization.

78470254017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718917119 (or 8718917116 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The spelling of 78470254017 in words is "seventy-eight billion, four hundred seventy million, two hundred fifty-four thousand, seventeen".