25538744783506 has 8 divisors (see below), whose sum is σ = 38308144164480. Its totient is φ = 12769363395348.

The previous prime is 25538744783501. The next prime is 25538744783603. The reversal of 25538744783506 is 60538744783552.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (25538744783501) 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, 82986 + ... + 7147333.

It is an arithmetic number, because the mean of its divisors is an integer number (4788518020560).

Almost surely, 2^{25538744783506} is an apocalyptic number.

25538744783506 is a deficient number, since it is larger than the sum of its proper divisors (12769399380974).

25538744783506 is a wasteful number, since it uses less digits than its factorization.

25538744783506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8996408.

The product of its (nonzero) digits is 677376000, while the sum is 67.

The spelling of 25538744783506 in words is "twenty-five trillion, five hundred thirty-eight billion, seven hundred forty-four million, seven hundred eighty-three thousand, five hundred six".