25123378133 has 8 divisors (see below), whose sum is σ = 28715929920. Its totient is φ = 21531700800.

The previous prime is 25123378127. The next prime is 25123378151. The reversal of 25123378133 is 33187332152.

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 25123378133 - 2⁴ = 25123378117 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 (25123378333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155843 + ... + 273008.

It is an arithmetic number, because the mean of its divisors is an integer number (3589491240).

Almost surely, 2^25123378133 is an apocalyptic number.

It is an amenable number.

25123378133 is a deficient number, since it is larger than the sum of its proper divisors (3592551787).

25123378133 is an equidigital number, since it uses as much as digits as its factorization.

25123378133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437227.

The product of its digits is 90720, while the sum is 38.

The spelling of 25123378133 in words is "twenty-five billion, one hundred twenty-three million, three hundred seventy-eight thousand, one hundred thirty-three".