25000280500 has 48 divisors (see below), whose sum is σ = 58800675024. Its totient is φ = 9230870400.

The previous prime is 25000280497. The next prime is 25000280567. The reversal of 25000280500 is 508200052.

It can be written as a sum of positive squares in 8 ways, for example, as 4182984976 + 20817295524 = 64676^2 + 144282^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1916599 + ... + 1929598.

It is an arithmetic number, because the mean of its divisors is an integer number (1225014063).

Almost surely, 2^25000280500 is an apocalyptic number.

25000280500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25000280500 is an abundant number, since it is smaller than the sum of its proper divisors (33800394524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25000280500 is a wasteful number, since it uses less digits than its factorization.

25000280500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846229 (or 3846217 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 25000280500 its reverse (508200052), we get a palindrome (25508480552).

The spelling of 25000280500 in words is "twenty-five billion, two hundred eighty thousand, five hundred".