127205346643 has 2 divisors, whose sum is σ = 127205346644. Its totient is φ = 127205346642.

The previous prime is 127205346641. The next prime is 127205346683. The reversal of 127205346643 is 346643502721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127205346643 - 2¹ = 127205346641 is a prime.

Together with 127205346641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 127205346643.

It is not a weakly prime, because it can be changed into another prime (127205346641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63602673321 + 63602673322.

It is an arithmetic number, because the mean of its divisors is an integer number (63602673322).

Almost surely, 2^127205346643 is an apocalyptic number.

127205346643 is a deficient number, since it is larger than the sum of its proper divisors (1).

127205346643 is an equidigital number, since it uses as much as digits as its factorization.

127205346643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 127205346643 in words is "one hundred twenty-seven billion, two hundred five million, three hundred forty-six thousand, six hundred forty-three".