25305144134 has 32 divisors (see below), whose sum is σ = 40708970496. Its totient is φ = 11769357600.

The previous prime is 25305144131. The next prime is 25305144211. The reversal of 25305144134 is 43144150352.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25305144134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305144131) 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 15 ways as a sum of consecutive naturals, for example, 302159 + ... + 376709.

It is an arithmetic number, because the mean of its divisors is an integer number (1272155328).

Almost surely, 2^25305144134 is an apocalyptic number.

25305144134 is a deficient number, since it is larger than the sum of its proper divisors (15403826362).

25305144134 is a wasteful number, since it uses less digits than its factorization.

25305144134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74780.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 25305144134 its reverse (43144150352), we get a palindrome (68449294486).

The spelling of 25305144134 in words is "twenty-five billion, three hundred five million, one hundred forty-four thousand, one hundred thirty-four".