25530280553 has 4 divisors (see below), whose sum is σ = 27032061780. Its totient is φ = 24028499328.

The previous prime is 25530280507. The next prime is 25530280597. The reversal of 25530280553 is 35508203552.

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 18919452304 + 6610828249 = 137548^2 + 81307^2 .

It is a cyclic number.

It is not a de Polignac number, because 25530280553 - 2¹⁰ = 25530279529 is a prime.

It is a super-2 number, since 2×25530280553² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25530210553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750890588 + ... + 750890621.

It is an arithmetic number, because the mean of its divisors is an integer number (6758015445).

Almost surely, 2^25530280553 is an apocalyptic number.

It is an amenable number.

25530280553 is a deficient number, since it is larger than the sum of its proper divisors (1501781227).

25530280553 is a wasteful number, since it uses less digits than its factorization.

25530280553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501781226.

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

The spelling of 25530280553 in words is "twenty-five billion, five hundred thirty million, two hundred eighty thousand, five hundred fifty-three".