25043135645 has 8 divisors (see below), whose sum is σ = 32783741280. Its totient is φ = 18213189520.

The previous prime is 25043135633. The next prime is 25043135651. The reversal of 25043135645 is 54653134052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25043135645 - 2²² = 25038941341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25043135599 and 25043135608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227664815 + ... + 227664924.

It is an arithmetic number, because the mean of its divisors is an integer number (4097967660).

Almost surely, 2^25043135645 is an apocalyptic number.

It is an amenable number.

25043135645 is a deficient number, since it is larger than the sum of its proper divisors (7740605635).

25043135645 is a wasteful number, since it uses less digits than its factorization.

25043135645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455329755.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 25043135645 its reverse (54653134052), we get a palindrome (79696269697).

The spelling of 25043135645 in words is "twenty-five billion, forty-three million, one hundred thirty-five thousand, six hundred forty-five".