25540232133 has 8 divisors (see below), whose sum is σ = 36673153888. Its totient is φ = 15717065904.

The previous prime is 25540232099. The next prime is 25540232153. The reversal of 25540232133 is 33123204552.

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

It is not a de Polignac number, because 25540232133 - 2¹⁸ = 25539969989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25540232133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540232153) 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, 327438835 + ... + 327438912.

It is an arithmetic number, because the mean of its divisors is an integer number (4584144236).

Almost surely, 2^25540232133 is an apocalyptic number.

It is an amenable number.

25540232133 is a deficient number, since it is larger than the sum of its proper divisors (11132921755).

25540232133 is a wasteful number, since it uses less digits than its factorization.

25540232133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654877763.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 25540232133 its reverse (33123204552), we get a palindrome (58663436685).

The spelling of 25540232133 in words is "twenty-five billion, five hundred forty million, two hundred thirty-two thousand, one hundred thirty-three".