127987482505 has 16 divisors (see below), whose sum is σ = 155723443344. Its totient is φ = 100964966400.

The previous prime is 127987482487. The next prime is 127987482509. The reversal of 127987482505 is 505284789721.

It can be written as a sum of positive squares in 8 ways, for example, as 11056312201 + 116931170304 = 105149^2 + 341952^2 .

It is not a de Polignac number, because 127987482505 - 2²³ = 127979093897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127987482505.

It is not an unprimeable number, because it can be changed into a prime (127987482509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715847 + ... + 1788883.

It is an arithmetic number, because the mean of its divisors is an integer number (9732715209).

Almost surely, 2^127987482505 is an apocalyptic number.

It is an amenable number.

127987482505 is a deficient number, since it is larger than the sum of its proper divisors (27735960839).

127987482505 is an equidigital number, since it uses as much as digits as its factorization.

127987482505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77916.

The product of its (nonzero) digits is 11289600, while the sum is 58.

The spelling of 127987482505 in words is "one hundred twenty-seven billion, nine hundred eighty-seven million, four hundred eighty-two thousand, five hundred five".