25471521604 has 27 divisors (see below), whose sum is σ = 44912284221. Its totient is φ = 12640161600.

The previous prime is 25471521577. The next prime is 25471521613. The reversal of 25471521604 is 40612517452.

The square root of 25471521604 is 159598.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25218075204 + 253446400 = 158802^2 + 15920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63519804 + ... + 63520204.

Almost surely, 2^25471521604 is an apocalyptic number.

25471521604 is the 159598-th square number.

It is an amenable number.

25471521604 is a deficient number, since it is larger than the sum of its proper divisors (19440762617).

25471521604 is an frugal number, since it uses more digits than its factorization.

25471521604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 25471521604 in words is "twenty-five billion, four hundred seventy-one million, five hundred twenty-one thousand, six hundred four".