25470862478717 has 4 divisors (see below), whose sum is σ = 25757051944860. Its totient is φ = 25184673012576.

The previous prime is 25470862478693. The next prime is 25470862478779. The reversal of 25470862478717 is 71787426807452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17500325188921 + 7970537289796 = 4183339^2 + 2823214^2 .

It is a cyclic number.

It is not a de Polignac number, because 25470862478717 - 2⁸ = 25470862478461 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 (25470862478617) 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, 143094732938 + ... + 143094733115.

It is an arithmetic number, because the mean of its divisors is an integer number (6439262986215).

Almost surely, 2^{25470862478717} is an apocalyptic number.

It is an amenable number.

25470862478717 is a deficient number, since it is larger than the sum of its proper divisors (286189466143).

25470862478717 is an equidigital number, since it uses as much as digits as its factorization.

25470862478717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286189466142.

The product of its (nonzero) digits is 295034880, while the sum is 68.

The spelling of 25470862478717 in words is "twenty-five trillion, four hundred seventy billion, eight hundred sixty-two million, four hundred seventy-eight thousand, seven hundred seventeen".