25202402245 has 8 divisors (see below), whose sum is σ = 30254280984. Its totient is φ = 20154322944.

The previous prime is 25202402231. The next prime is 25202402249. The reversal of 25202402245 is 54220420252.

It can be written as a sum of positive squares in 4 ways, for example, as 8703770436 + 16498631809 = 93294^2 + 128447^2 .

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 25202402245 - 2⁵ = 25202402213 is a prime.

It is a super-2 number, since 2×25202402245² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25202402249) 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, 935244 + ... + 961813.

It is an arithmetic number, because the mean of its divisors is an integer number (3781785123).

Almost surely, 2^25202402245 is an apocalyptic number.

It is an amenable number.

25202402245 is a deficient number, since it is larger than the sum of its proper divisors (5051878739).

25202402245 is a wasteful number, since it uses less digits than its factorization.

25202402245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899719.

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 25202402245 its reverse (54220420252), we get a palindrome (79422822497).

The spelling of 25202402245 in words is "twenty-five billion, two hundred two million, four hundred two thousand, two hundred forty-five".