25280380521 has 12 divisors (see below), whose sum is σ = 39835751280. Its totient is φ = 15321442680.

The previous prime is 25280380513. The next prime is 25280380523. The reversal of 25280380521 is 12508308252.

25280380521 is a `hidden beast` number, since 2 + 52 + 8 + 0 + 3 + 80 + 521 = 666.

It is not a de Polignac number, because 25280380521 - 2³ = 25280380513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25280380523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127678591 + ... + 127678788.

It is an arithmetic number, because the mean of its divisors is an integer number (3319645940).

Almost surely, 2^25280380521 is an apocalyptic number.

It is an amenable number.

25280380521 is a deficient number, since it is larger than the sum of its proper divisors (14555370759).

25280380521 is a wasteful number, since it uses less digits than its factorization.

25280380521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255357396 (or 255357393 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

Adding to 25280380521 its reverse (12508308252), we get a palindrome (37788688773).

The spelling of 25280380521 in words is "twenty-five billion, two hundred eighty million, three hundred eighty thousand, five hundred twenty-one".