25505503028 has 6 divisors (see below), whose sum is σ = 44634630306. Its totient is φ = 12752751512.

The previous prime is 25505502977. The next prime is 25505503039. The reversal of 25505503028 is 82030550552.

It can be written as a sum of positive squares in only one way, i.e., 24254324644 + 1251178384 = 155738^2 + 35372^2 .

It is a super-2 number, since 2×25505503028² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3188187875 + ... + 3188187882.

It is an arithmetic number, because the mean of its divisors is an integer number (7439105051).

Almost surely, 2^25505503028 is an apocalyptic number.

It is an amenable number.

25505503028 is a deficient number, since it is larger than the sum of its proper divisors (19129127278).

25505503028 is a wasteful number, since it uses less digits than its factorization.

25505503028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6376375761 (or 6376375759 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 25505503028 in words is "twenty-five billion, five hundred five million, five hundred three thousand, twenty-eight".