25345353503 has 4 divisors (see below), whose sum is σ = 26219331240. Its totient is φ = 24471375768.

The previous prime is 25345353469. The next prime is 25345353557. The reversal of 25345353503 is 30535354352.

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 25345353503 - 2²⁰ = 25344304927 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 (25345352503) 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, 436988825 + ... + 436988882.

It is an arithmetic number, because the mean of its divisors is an integer number (6554832810).

Almost surely, 2^25345353503 is an apocalyptic number.

25345353503 is a deficient number, since it is larger than the sum of its proper divisors (873977737).

25345353503 is an equidigital number, since it uses as much as digits as its factorization.

25345353503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873977736.

The product of its (nonzero) digits is 405000, while the sum is 38.

The spelling of 25345353503 in words is "twenty-five billion, three hundred forty-five million, three hundred fifty-three thousand, five hundred three".