78248315246617 has 8 divisors (see below), whose sum is σ = 78269736814280. Its totient is φ = 78226894264320.

The previous prime is 78248315246609. The next prime is 78248315246623. The reversal of 78248315246617 is 71664251384287.

It can be written as a sum of positive squares in 4 ways, for example, as 12854956915161 + 65393358331456 = 3585381^2 + 8086616^2 .

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 78248315246617 - 2³ = 78248315246609 is a prime.

It is a super-2 number, since 2×78248315246617² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78248312246617) 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, 466210009 + ... + 466377817.

It is an arithmetic number, because the mean of its divisors is an integer number (9783717101785).

Almost surely, 2^{78248315246617} is an apocalyptic number.

It is an amenable number.

78248315246617 is a deficient number, since it is larger than the sum of its proper divisors (21421567663).

78248315246617 is a wasteful number, since it uses less digits than its factorization.

78248315246617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292683.

The product of its digits is 108380160, while the sum is 64.

The spelling of 78248315246617 in words is "seventy-eight trillion, two hundred forty-eight billion, three hundred fifteen million, two hundred forty-six thousand, six hundred seventeen".