127766431587 has 16 divisors (see below), whose sum is σ = 172381547520. Its totient is φ = 84165715392.

The previous prime is 127766431567. The next prime is 127766431591. The reversal of 127766431587 is 785134667721.

It is not a de Polignac number, because 127766431587 - 2³⁰ = 126692689763 is a prime.

It is a super-2 number, since 2×127766431587² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127766431517) 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, 256918 + ... + 567044.

It is an arithmetic number, because the mean of its divisors is an integer number (10773846720).

Almost surely, 2^127766431587 is an apocalyptic number.

127766431587 is a deficient number, since it is larger than the sum of its proper divisors (44615115933).

127766431587 is a wasteful number, since it uses less digits than its factorization.

127766431587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311762.

The product of its digits is 11854080, while the sum is 57.

The spelling of 127766431587 in words is "one hundred twenty-seven billion, seven hundred sixty-six million, four hundred thirty-one thousand, five hundred eighty-seven".