25755057505 has 4 divisors (see below), whose sum is σ = 30906069012. Its totient is φ = 20604046000.

The previous prime is 25755057491. The next prime is 25755057521. The reversal of 25755057505 is 50575055752.

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 16268492304 + 9486565201 = 127548^2 + 97399^2 .

It is not a de Polignac number, because 25755057505 - 2²¹ = 25752960353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575505746 + ... + 2575505755.

It is an arithmetic number, because the mean of its divisors is an integer number (7726517253).

Almost surely, 2^25755057505 is an apocalyptic number.

It is an amenable number.

25755057505 is a deficient number, since it is larger than the sum of its proper divisors (5151011507).

25755057505 is an equidigital number, since it uses as much as digits as its factorization.

25755057505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151011506.

The product of its (nonzero) digits is 1531250, while the sum is 46.

The spelling of 25755057505 in words is "twenty-five billion, seven hundred fifty-five million, fifty-seven thousand, five hundred five".