25055521055503 has 4 divisors (see below), whose sum is σ = 25055569244520. Its totient is φ = 25055472866488.

The previous prime is 25055521055431. The next prime is 25055521055599. The reversal of 25055521055503 is 30555012555052.

It is a happy number.

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 25055521055503 - 2³⁷ = 24918082102031 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 25055521055503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25055521055003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23305993 + ... + 24357346.

It is an arithmetic number, because the mean of its divisors is an integer number (6263892311130).

Almost surely, 2^{25055521055503} is an apocalyptic number.

25055521055503 is a deficient number, since it is larger than the sum of its proper divisors (48189017).

25055521055503 is an equidigital number, since it uses as much as digits as its factorization.

25055521055503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48189016.

The product of its (nonzero) digits is 937500, while the sum is 43.

The spelling of 25055521055503 in words is "twenty-five trillion, fifty-five billion, five hundred twenty-one million, fifty-five thousand, five hundred three".