25218480433 has 4 divisors (see below), whose sum is σ = 26314936128. Its totient is φ = 24122024740.

The previous prime is 25218480403. The next prime is 25218480467. The reversal of 25218480433 is 33408481252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25218480433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25218480403) 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, 548227813 + ... + 548227858.

It is an arithmetic number, because the mean of its divisors is an integer number (6578734032).

Almost surely, 2^25218480433 is an apocalyptic number.

25218480433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25218480433 is a deficient number, since it is larger than the sum of its proper divisors (1096455695).

25218480433 is a wasteful number, since it uses less digits than its factorization.

25218480433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096455694.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 25218480433 in words is "twenty-five billion, two hundred eighteen million, four hundred eighty thousand, four hundred thirty-three".