25528030553 has 4 divisors (see below), whose sum is σ = 25540467108. Its totient is φ = 25515594000.

The previous prime is 25528030543. The next prime is 25528030631. The reversal of 25528030553 is 35503082552.

It is a happy number.

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 15446264089 + 10081766464 = 124283^2 + 100408^2 .

It is a cyclic number.

It is not a de Polignac number, because 25528030553 - 2⁴ = 25528030537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25528030513) 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, 6215198 + ... + 6219303.

It is an arithmetic number, because the mean of its divisors is an integer number (6385116777).

Almost surely, 2^25528030553 is an apocalyptic number.

It is an amenable number.

25528030553 is a deficient number, since it is larger than the sum of its proper divisors (12436555).

25528030553 is a wasteful number, since it uses less digits than its factorization.

25528030553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12436554.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 25528030553 in words is "twenty-five billion, five hundred twenty-eight million, thirty thousand, five hundred fifty-three".