25312173604 has 9 divisors (see below), whose sum is σ = 44296860657. Its totient is φ = 12655927704.

The previous prime is 25312173583. The next prime is 25312173629. The reversal of 25312173604 is 40637121352.

The square root of 25312173604 is 159098.

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., 25280364004 + 31809600 = 158998^2 + 5640^2 .

It is a super-2 number, since 2×25312173604² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25312173604.

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 2 ways as a sum of consecutive naturals, for example, 278422 + ... + 357970.

Almost surely, 2^25312173604 is an apocalyptic number.

25312173604 is the 159098-th square number.

It is an amenable number.

25312173604 is a deficient number, since it is larger than the sum of its proper divisors (18984687053).

25312173604 is an frugal number, since it uses more digits than its factorization.

25312173604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159102 (or 79551 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 25312173604 its reverse (40637121352), we get a palindrome (65949294956).

It can be divided in two parts, 25312 and 173604, that added together give a square (198916 = 446²).

The spelling of 25312173604 in words is "twenty-five billion, three hundred twelve million, one hundred seventy-three thousand, six hundred four".