25526500465 has 4 divisors (see below), whose sum is σ = 30631800564. Its totient is φ = 20421200368.

The previous prime is 25526500463. The next prime is 25526500487. The reversal of 25526500465 is 56400562552.

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 16959331984 + 8567168481 = 130228^2 + 92559^2 .

It is a cyclic number.

It is not a de Polignac number, because 25526500465 - 2¹ = 25526500463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25526500463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552650042 + ... + 2552650051.

It is an arithmetic number, because the mean of its divisors is an integer number (7657950141).

Almost surely, 2^25526500465 is an apocalyptic number.

It is an amenable number.

25526500465 is a deficient number, since it is larger than the sum of its proper divisors (5105300099).

25526500465 is an equidigital number, since it uses as much as digits as its factorization.

25526500465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105300098.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 25526500465 in words is "twenty-five billion, five hundred twenty-six million, five hundred thousand, four hundred sixty-five".