25081628533 has 4 divisors (see below), whose sum is σ = 27010984588. Its totient is φ = 23152272480.

The previous prime is 25081628461. The next prime is 25081628581. The reversal of 25081628533 is 33582618052.

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 15172819684 + 9908808849 = 123178^2 + 99543^2 .

It is a cyclic number.

It is not a de Polignac number, because 25081628533 - 2²⁹ = 24544757621 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 25081628533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25081628233) 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, 964678008 + ... + 964678033.

It is an arithmetic number, because the mean of its divisors is an integer number (6752746147).

Almost surely, 2^25081628533 is an apocalyptic number.

It is an amenable number.

25081628533 is a deficient number, since it is larger than the sum of its proper divisors (1929356055).

25081628533 is a wasteful number, since it uses less digits than its factorization.

25081628533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929356054.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 25081628533 in words is "twenty-five billion, eighty-one million, six hundred twenty-eight thousand, five hundred thirty-three".