127908515449 has 81 divisors (see below), whose sum is σ = 158644254951. Its totient is φ = 103001184000.

The previous prime is 127908515431. The next prime is 127908515473. The reversal of 127908515449 is 944515809721.

The square root of 127908515449 is 357643.

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

It can be written as a sum of positive squares in 13 ways, for example, as 65492487225 + 62416028224 = 255915^2 + 249832^2 .

It is not a de Polignac number, because 127908515449 - 2⁵ = 127908515417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127908515449.

It is not an unprimeable number, because it can be changed into a prime (127908515419) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2096860879 + ... + 2096860939.

Almost surely, 2^127908515449 is an apocalyptic number.

127908515449 is the 357643-rd square number.

127908515449 is the 178822-nd centered octagonal number.

It is an amenable number.

127908515449 is a deficient number, since it is larger than the sum of its proper divisors (30735739502).

127908515449 is an equidigital number, since it uses as much as digits as its factorization.

127908515449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 127908515449 in words is "one hundred twenty-seven billion, nine hundred eight million, five hundred fifteen thousand, four hundred forty-nine".