127758349489 has 9 divisors (see below), whose sum is σ = 128747046337. Its totient is φ = 126777195904.

The previous prime is 127758349487. The next prime is 127758349517. The reversal of 127758349489 is 984943857721.

The square root of 127758349489 is 357433.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 600495025 + 127157854464 = 24505^2 + 356592^2 .

It is not a de Polignac number, because 127758349489 - 2¹ = 127758349487 is a prime.

It is a super-2 number, since 2×127758349489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127758349487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48967017 + ... + 48969625.

Almost surely, 2^127758349489 is an apocalyptic number.

127758349489 is the 357433-rd square number.

127758349489 is the 178717-th centered octagonal number.

It is an amenable number.

127758349489 is a deficient number, since it is larger than the sum of its proper divisors (988696848).

127758349489 is an frugal number, since it uses more digits than its factorization.

127758349489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492 (or 2746 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 67.

The spelling of 127758349489 in words is "one hundred twenty-seven billion, seven hundred fifty-eight million, three hundred forty-nine thousand, four hundred eighty-nine".