25178000797 has 4 divisors (see below), whose sum is σ = 25408991740. Its totient is φ = 24947009856.

The previous prime is 25178000753. The next prime is 25178000831. The reversal of 25178000797 is 79700087152.

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 10124183161 + 15053817636 = 100619^2 + 122694^2 .

It is a cyclic number.

It is not a de Polignac number, because 25178000797 - 2⁷ = 25178000669 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 (25178000717) 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, 115495308 + ... + 115495525.

It is an arithmetic number, because the mean of its divisors is an integer number (6352247935).

Almost surely, 2^25178000797 is an apocalyptic number.

25178000797 is the 91612-nd hex number.

It is an amenable number.

25178000797 is a deficient number, since it is larger than the sum of its proper divisors (230990943).

25178000797 is a wasteful number, since it uses less digits than its factorization.

25178000797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230990942.

The product of its (nonzero) digits is 246960, while the sum is 46.

The spelling of 25178000797 in words is "twenty-five billion, one hundred seventy-eight million, seven hundred ninety-seven", and thus it is an aban number.