25148641408 has 64 divisors (see below), whose sum is σ = 54686949120. Its totient is φ = 11424609280.

The previous prime is 25148641403. The next prime is 25148641451. The reversal of 25148641408 is 80414684152.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (25148641403) 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, 3103410 + ... + 3111502.

It is an arithmetic number, because the mean of its divisors is an integer number (854483580).

Almost surely, 2^25148641408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25148641408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27343474560).

25148641408 is an abundant number, since it is smaller than the sum of its proper divisors (29538307712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25148641408 is a wasteful number, since it uses less digits than its factorization.

25148641408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10325 (or 10313 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 25148641408 in words is "twenty-five billion, one hundred forty-eight million, six hundred forty-one thousand, four hundred eight".