25506627541 has 4 divisors (see below), whose sum is σ = 26049321792. Its totient is φ = 24963933292.

The previous prime is 25506627533. The next prime is 25506627571. The reversal of 25506627541 is 14572660552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25506627541 - 2³ = 25506627533 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506627521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271347055 + ... + 271347148.

It is an arithmetic number, because the mean of its divisors is an integer number (6512330448).

Almost surely, 2^25506627541 is an apocalyptic number.

It is an amenable number.

25506627541 is a deficient number, since it is larger than the sum of its proper divisors (542694251).

25506627541 is an equidigital number, since it uses as much as digits as its factorization.

25506627541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542694250.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 25506627541 in words is "twenty-five billion, five hundred six million, six hundred twenty-seven thousand, five hundred forty-one".