25705189952 has 56 divisors (see below), whose sum is σ = 55969043256. Its totient is φ = 11640066048.

The previous prime is 25705189943. The next prime is 25705189957. The reversal of 25705189952 is 25998150752.

It can be written as a sum of positive squares in 4 ways, for example, as 5088824896 + 20616365056 = 71336^2 + 143584^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 25705189894 and 25705189903.

It is not an unprimeable number, because it can be changed into a prime (25705189957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247373 + ... + 335564.

It is an arithmetic number, because the mean of its divisors is an integer number (999447201).

Almost surely, 2^25705189952 is an apocalyptic number.

It is an amenable number.

25705189952 is an abundant number, since it is smaller than the sum of its proper divisors (30263853304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25705189952 is a wasteful number, since it uses less digits than its factorization.

25705189952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583015 (or 583005 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 53.

The spelling of 25705189952 in words is "twenty-five billion, seven hundred five million, one hundred eighty-nine thousand, nine hundred fifty-two".