25534869133 has 4 divisors (see below), whose sum is σ = 25585036380. Its totient is φ = 25484701888.

The previous prime is 25534869131. The next prime is 25534869137. The reversal of 25534869133 is 33196843552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16938241609 + 8596627524 = 130147^2 + 92718^2 .

It is a cyclic number.

It is not a de Polignac number, because 25534869133 - 2¹ = 25534869131 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25534869131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25082860 + ... + 25083877.

It is an arithmetic number, because the mean of its divisors is an integer number (6396259095).

Almost surely, 2^25534869133 is an apocalyptic number.

It is an amenable number.

25534869133 is a deficient number, since it is larger than the sum of its proper divisors (50167247).

25534869133 is an equidigital number, since it uses as much as digits as its factorization.

25534869133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50167246.

The product of its digits is 2332800, while the sum is 49.

The spelling of 25534869133 in words is "twenty-five billion, five hundred thirty-four million, eight hundred sixty-nine thousand, one hundred thirty-three".