25218548813 has 8 divisors (see below), whose sum is σ = 25634612256. Its totient is φ = 24802570800.

The previous prime is 25218548801. The next prime is 25218548827. The reversal of 25218548813 is 31884581252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25218548813 - 2¹⁰ = 25218547789 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 (25218548213) 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 7 ways as a sum of consecutive naturals, for example, 894470 + ... + 922232.

It is an arithmetic number, because the mean of its divisors is an integer number (3204326532).

Almost surely, 2^25218548813 is an apocalyptic number.

It is an amenable number.

25218548813 is a deficient number, since it is larger than the sum of its proper divisors (416063443).

25218548813 is a wasteful number, since it uses less digits than its factorization.

25218548813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42715.

The product of its digits is 614400, while the sum is 47.

The spelling of 25218548813 in words is "twenty-five billion, two hundred eighteen million, five hundred forty-eight thousand, eight hundred thirteen".