25055532505 has 4 divisors (see below), whose sum is σ = 30066639012. Its totient is φ = 20044426000.

The previous prime is 25055532499. The next prime is 25055532511. The reversal of 25055532505 is 50523555052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25055532499) and next prime (25055532511).

It can be written as a sum of positive squares in 2 ways, for example, as 16870892544 + 8184639961 = 129888^2 + 90469^2 .

It is not a de Polignac number, because 25055532505 - 2¹⁷ = 25055401433 is a prime.

It is a super-2 number, since 2×25055532505² (a number of 22 digits) contains 22 as substring.

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, 2505553246 + ... + 2505553255.

It is an arithmetic number, because the mean of its divisors is an integer number (7516659753).

Almost surely, 2^25055532505 is an apocalyptic number.

It is an amenable number.

25055532505 is a deficient number, since it is larger than the sum of its proper divisors (5011106507).

25055532505 is an equidigital number, since it uses as much as digits as its factorization.

25055532505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011106506.

The product of its (nonzero) digits is 187500, while the sum is 37.

The spelling of 25055532505 in words is "twenty-five billion, fifty-five million, five hundred thirty-two thousand, five hundred five".