127661159797 has 2 divisors, whose sum is σ = 127661159798. Its totient is φ = 127661159796.

The previous prime is 127661159777. The next prime is 127661159833. The reversal of 127661159797 is 797951166721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127196369316 + 464790481 = 356646^2 + 21559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127661159797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127661159777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63830579898 + 63830579899.

It is an arithmetic number, because the mean of its divisors is an integer number (63830579899).

Almost surely, 2^127661159797 is an apocalyptic number.

It is an amenable number.

127661159797 is a deficient number, since it is larger than the sum of its proper divisors (1).

127661159797 is an equidigital number, since it uses as much as digits as its factorization.

127661159797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 61.

The spelling of 127661159797 in words is "one hundred twenty-seven billion, six hundred sixty-one million, one hundred fifty-nine thousand, seven hundred ninety-seven".