127138528516 has 6 divisors (see below), whose sum is σ = 222492424910. Its totient is φ = 63569264256.

The previous prime is 127138528501. The next prime is 127138528579. The reversal of 127138528516 is 615825831721.

It can be written as a sum of positive squares in only one way, i.e., 122187998916 + 4950529600 = 349554^2 + 70360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 127138528516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15892316061 + ... + 15892316068.

Almost surely, 2^127138528516 is an apocalyptic number.

It is an amenable number.

127138528516 is a deficient number, since it is larger than the sum of its proper divisors (95353896394).

127138528516 is a wasteful number, since it uses less digits than its factorization.

127138528516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31784632133 (or 31784632131 counting only the distinct ones).

The product of its digits is 806400, while the sum is 49.

The spelling of 127138528516 in words is "one hundred twenty-seven billion, one hundred thirty-eight million, five hundred twenty-eight thousand, five hundred sixteen".