25641605841 has 8 divisors (see below), whose sum is σ = 34189775040. Its totient is φ = 17093920272.

The previous prime is 25641605839. The next prime is 25641605879. The reversal of 25641605841 is 14850614652.

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

It is not a de Polignac number, because 25641605841 - 2¹ = 25641605839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25641605793 and 25641605802.

It is not an unprimeable number, because it can be changed into a prime (25641605881) 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, 29556 + ... + 228378.

It is an arithmetic number, because the mean of its divisors is an integer number (4273721880).

Almost surely, 2^25641605841 is an apocalyptic number.

It is an amenable number.

25641605841 is a deficient number, since it is larger than the sum of its proper divisors (8548169199).

25641605841 is a wasteful number, since it uses less digits than its factorization.

25641605841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241815.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 25641605841 in words is "twenty-five billion, six hundred forty-one million, six hundred five thousand, eight hundred forty-one".