127765012537 has 2 divisors, whose sum is σ = 127765012538. Its totient is φ = 127765012536.

The previous prime is 127765012519. The next prime is 127765012559. The reversal of 127765012537 is 735210567721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124259070016 + 3505942521 = 352504^2 + 59211^2 .

It is a cyclic number.

It is not a de Polignac number, because 127765012537 - 2⁷ = 127765012409 is a prime.

It is not a weakly prime, because it can be changed into another prime (127765012577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63882506268 + 63882506269.

It is an arithmetic number, because the mean of its divisors is an integer number (63882506269).

Almost surely, 2^127765012537 is an apocalyptic number.

It is an amenable number.

127765012537 is a deficient number, since it is larger than the sum of its proper divisors (1).

127765012537 is an equidigital number, since it uses as much as digits as its factorization.

127765012537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 127765012537 in words is "one hundred twenty-seven billion, seven hundred sixty-five million, twelve thousand, five hundred thirty-seven".