25343032644 has 36 divisors (see below), whose sum is σ = 64067337516. Its totient is φ = 8446915008.

The previous prime is 25343032619. The next prime is 25343032657. The reversal of 25343032644 is 44623034352.

25343032644 is a `hidden beast` number, since 2 + 5 + 3 + 4 + 3 + 0 + 3 + 2 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1057550400 + 24285482244 = 32520^2 + 155838^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25343032599 and 25343032608.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489922 + ... + 539174.

Almost surely, 2^25343032644 is an apocalyptic number.

It is an amenable number.

25343032644 is an abundant number, since it is smaller than the sum of its proper divisors (38724304872).

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

25343032644 is a wasteful number, since it uses less digits than its factorization.

25343032644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63556 (or 63551 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 36.

Adding to 25343032644 its reverse (44623034352), we get a palindrome (69966066996).

The spelling of 25343032644 in words is "twenty-five billion, three hundred forty-three million, thirty-two thousand, six hundred forty-four".