25165635630643 has 2 divisors, whose sum is σ = 25165635630644. Its totient is φ = 25165635630642.

The previous prime is 25165635630601. The next prime is 25165635630727. The reversal of 25165635630643 is 34603653656152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25165635630643 is a prime.

It is not a weakly prime, because it can be changed into another prime (25165635630743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582817815321 + 12582817815322.

It is an arithmetic number, because the mean of its divisors is an integer number (12582817815322).

Almost surely, 2^{25165635630643} is an apocalyptic number.

25165635630643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25165635630643 is an equidigital number, since it uses as much as digits as its factorization.

25165635630643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992000, while the sum is 55.

The spelling of 25165635630643 in words is "twenty-five trillion, one hundred sixty-five billion, six hundred thirty-five million, six hundred thirty thousand, six hundred forty-three".