25605145204 has 12 divisors (see below), whose sum is σ = 47444828004. Its totient is φ = 12049480064.

The previous prime is 25605145183. The next prime is 25605145231. The reversal of 25605145204 is 40254150652.

It can be written as a sum of positive squares in 2 ways, for example, as 11588953104 + 14016192100 = 107652^2 + 118390^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 25605145204.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 188273059 + ... + 188273194.

It is an arithmetic number, because the mean of its divisors is an integer number (3953735667).

Almost surely, 2^25605145204 is an apocalyptic number.

It is an amenable number.

25605145204 is a deficient number, since it is larger than the sum of its proper divisors (21839682800).

25605145204 is a wasteful number, since it uses less digits than its factorization.

25605145204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376546274 (or 376546272 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 25605145204 its reverse (40254150652), we get a palindrome (65859295856).

The spelling of 25605145204 in words is "twenty-five billion, six hundred five million, one hundred forty-five thousand, two hundred four".