25320325546 has 8 divisors (see below), whose sum is σ = 39290160420. Its totient is φ = 12223605408.

The previous prime is 25320325531. The next prime is 25320325561. The reversal of 25320325546 is 64552302352.

It is an interprime number because it is at equal distance from previous prime (25320325531) and next prime (25320325561).

It can be written as a sum of positive squares in 2 ways, for example, as 23519596321 + 1800729225 = 153361^2 + 42435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×25320325546² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 218278611 + ... + 218278726.

Almost surely, 2^25320325546 is an apocalyptic number.

25320325546 is a deficient number, since it is larger than the sum of its proper divisors (13969834874).

25320325546 is a wasteful number, since it uses less digits than its factorization.

25320325546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436557368.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 25320325546 its reverse (64552302352), we get a palindrome (89872627898).

The spelling of 25320325546 in words is "twenty-five billion, three hundred twenty million, three hundred twenty-five thousand, five hundred forty-six".