25670055643 has 2 divisors, whose sum is σ = 25670055644. Its totient is φ = 25670055642.

The previous prime is 25670055629. The next prime is 25670055661. The reversal of 25670055643 is 34655007652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25670055643 is a prime.

It is a super-2 number, since 2×25670055643² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25670055643.

It is not a weakly prime, because it can be changed into another prime (25670055673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835027821 + 12835027822.

It is an arithmetic number, because the mean of its divisors is an integer number (12835027822).

Almost surely, 2^25670055643 is an apocalyptic number.

25670055643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25670055643 is an equidigital number, since it uses as much as digits as its factorization.

25670055643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 25670055643 in words is "twenty-five billion, six hundred seventy million, fifty-five thousand, six hundred forty-three".