127765250009 has 2 divisors, whose sum is σ = 127765250010. Its totient is φ = 127765250008.

The previous prime is 127765249981. The next prime is 127765250029. The reversal of 127765250009 is 900052567721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88016055625 + 39749194384 = 296675^2 + 199372^2 .

It is a cyclic number.

It is not a de Polignac number, because 127765250009 - 2¹⁶ = 127765184473 is a prime.

It is not a weakly prime, because it can be changed into another prime (127765250029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63882625004 + 63882625005.

It is an arithmetic number, because the mean of its divisors is an integer number (63882625005).

Almost surely, 2^127765250009 is an apocalyptic number.

It is an amenable number.

127765250009 is a deficient number, since it is larger than the sum of its proper divisors (1).

127765250009 is an equidigital number, since it uses as much as digits as its factorization.

127765250009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 127765250009 in words is "one hundred twenty-seven billion, seven hundred sixty-five million, two hundred fifty thousand, nine".