25502505503 has 4 divisors (see below), whose sum is σ = 25502863848. Its totient is φ = 25502147160.

The previous prime is 25502505499. The next prime is 25502505517. The reversal of 25502505503 is 30550520552.

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

It is a cyclic number.

It is not a de Polignac number, because 25502505503 - 2² = 25502505499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25502505503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25502505533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32276 + ... + 228137.

It is an arithmetic number, because the mean of its divisors is an integer number (6375715962).

Almost surely, 2^25502505503 is an apocalyptic number.

25502505503 is a deficient number, since it is larger than the sum of its proper divisors (358345).

25502505503 is an equidigital number, since it uses as much as digits as its factorization.

25502505503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358344.

The product of its (nonzero) digits is 37500, while the sum is 32.

The spelling of 25502505503 in words is "twenty-five billion, five hundred two million, five hundred five thousand, five hundred three".