25738461438 has 8 divisors (see below), whose sum is σ = 51476922888. Its totient is φ = 8579487144.

The previous prime is 25738461409. The next prime is 25738461439. The reversal of 25738461438 is 83416483752.

It is a happy number.

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

25738461438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25738461439) 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, 2144871781 + ... + 2144871792.

It is an arithmetic number, because the mean of its divisors is an integer number (6434615361).

Almost surely, 2^25738461438 is an apocalyptic number.

25738461438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25738461438 is a wasteful number, since it uses less digits than its factorization.

25738461438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289743578.

The product of its digits is 3870720, while the sum is 51.

The spelling of 25738461438 in words is "twenty-five billion, seven hundred thirty-eight million, four hundred sixty-one thousand, four hundred thirty-eight".