25250770717 has 4 divisors (see below), whose sum is σ = 25261117596. Its totient is φ = 25240423840.

The previous prime is 25250770691. The next prime is 25250770733. The reversal of 25250770717 is 71707705252.

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 15637752601 + 9613018116 = 125051^2 + 98046^2 .

It is a cyclic number.

It is not a de Polignac number, because 25250770717 - 2³¹ = 23103287069 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 (25250770217) 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, 5169778 + ... + 5174659.

It is an arithmetic number, because the mean of its divisors is an integer number (6315279399).

Almost surely, 2^25250770717 is an apocalyptic number.

It is an amenable number.

25250770717 is a deficient number, since it is larger than the sum of its proper divisors (10346879).

25250770717 is a wasteful number, since it uses less digits than its factorization.

25250770717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346878.

The product of its (nonzero) digits is 240100, while the sum is 43.

The spelling of 25250770717 in words is "twenty-five billion, two hundred fifty million, seven hundred seventy thousand, seven hundred seventeen".