25580078876501 has 4 divisors (see below), whose sum is σ = 25648658176812. Its totient is φ = 25511499576192.

The previous prime is 25580078876497. The next prime is 25580078876593. The reversal of 25580078876501 is 10567887008552.

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 18553470775876 + 7026608100625 = 4307374^2 + 2650775^2 .

It is a cyclic number.

It is not a de Polignac number, because 25580078876501 - 2² = 25580078876497 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 (25580078846501) 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, 34289649596 + ... + 34289650341.

It is an arithmetic number, because the mean of its divisors is an integer number (6412164544203).

Almost surely, 2^{25580078876501} is an apocalyptic number.

It is an amenable number.

25580078876501 is a deficient number, since it is larger than the sum of its proper divisors (68579300311).

25580078876501 is an equidigital number, since it uses as much as digits as its factorization.

25580078876501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68579300310.

The product of its (nonzero) digits is 37632000, while the sum is 62.

The spelling of 25580078876501 in words is "twenty-five trillion, five hundred eighty billion, seventy-eight million, eight hundred seventy-six thousand, five hundred one".