25552665673 has 8 divisors (see below), whose sum is σ = 25634405160. Its totient is φ = 25471057920.

The previous prime is 25552665661. The next prime is 25552665701. The reversal of 25552665673 is 37656625552.

It can be written as a sum of positive squares in 4 ways, for example, as 5322723849 + 20229941824 = 72957^2 + 142232^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25552665673 - 2²¹ = 25550568521 is a prime.

It is a super-2 number, since 2×25552665673² (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 25552665673.

It is not an unprimeable number, because it can be changed into a prime (25552665973) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 363193 + ... + 427801.

It is an arithmetic number, because the mean of its divisors is an integer number (3204300645).

Almost surely, 2^25552665673 is an apocalyptic number.

It is an amenable number.

25552665673 is a deficient number, since it is larger than the sum of its proper divisors (81739487).

25552665673 is an equidigital number, since it uses as much as digits as its factorization.

25552665673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65867.

The product of its digits is 11340000, while the sum is 52.

The spelling of 25552665673 in words is "twenty-five billion, five hundred fifty-two million, six hundred sixty-five thousand, six hundred seventy-three".