25255552505503 has 4 divisors (see below), whose sum is σ = 26070247747648. Its totient is φ = 24440857263360.

The previous prime is 25255552505467. The next prime is 25255552505539. The reversal of 25255552505503 is 30550525555252.

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 (25255552505467) and next prime (25255552505539).

It is a cyclic number.

It is not a de Polignac number, because 25255552505503 - 2¹⁷ = 25255552374431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255552505303) 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, 407347621026 + ... + 407347621087.

It is an arithmetic number, because the mean of its divisors is an integer number (6517561936912).

Almost surely, 2^{25255552505503} is an apocalyptic number.

25255552505503 is a deficient number, since it is larger than the sum of its proper divisors (814695242145).

25255552505503 is an equidigital number, since it uses as much as digits as its factorization.

25255552505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814695242144.

The product of its (nonzero) digits is 9375000, while the sum is 49.

The spelling of 25255552505503 in words is "twenty-five trillion, two hundred fifty-five billion, five hundred fifty-two million, five hundred five thousand, five hundred three".