127661071623733 has 2 divisors, whose sum is σ = 127661071623734. Its totient is φ = 127661071623732.

The previous prime is 127661071623629. The next prime is 127661071623739. The reversal of 127661071623733 is 337326170166721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122571070877124 + 5090000746609 = 11071182^2 + 2256103^2 .

It is an emirp because it is prime and its reverse (337326170166721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127661071623733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127661071623739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63830535811866 + 63830535811867.

It is an arithmetic number, because the mean of its divisors is an integer number (63830535811867).

Almost surely, 2^{127661071623733} is an apocalyptic number.

It is an amenable number.

127661071623733 is a deficient number, since it is larger than the sum of its proper divisors (1).

127661071623733 is an equidigital number, since it uses as much as digits as its factorization.

127661071623733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 55.

The spelling of 127661071623733 in words is "one hundred twenty-seven trillion, six hundred sixty-one billion, seventy-one million, six hundred twenty-three thousand, seven hundred thirty-three".