25006402438 has 8 divisors (see below), whose sum is σ = 37519176888. Its totient is φ = 12500010144.

The previous prime is 25006402409. The next prime is 25006402439. The reversal of 25006402438 is 83420460052.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25006402439) 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, 1585731 + ... + 1601422.

It is an arithmetic number, because the mean of its divisors is an integer number (4689897111).

Almost surely, 2^25006402438 is an apocalyptic number.

25006402438 is a deficient number, since it is larger than the sum of its proper divisors (12512774450).

25006402438 is a wasteful number, since it uses less digits than its factorization.

25006402438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191078.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 25006402438 in words is "twenty-five billion, six million, four hundred two thousand, four hundred thirty-eight".