127905396651 has 56 divisors (see below), whose sum is σ = 198550794960. Its totient is φ = 82260360000.

The previous prime is 127905396649. The next prime is 127905396679. The reversal of 127905396651 is 156693509721.

127905396651 is a `hidden beast` number, since 12 + 7 + 90 + 539 + 6 + 6 + 5 + 1 = 666.

It is not a de Polignac number, because 127905396651 - 2¹ = 127905396649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127905396631) 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 55 ways as a sum of consecutive naturals, for example, 39341776 + ... + 39345026.

It is an arithmetic number, because the mean of its divisors is an integer number (3545549910).

Almost surely, 2^127905396651 is an apocalyptic number.

127905396651 is a deficient number, since it is larger than the sum of its proper divisors (70645398309).

127905396651 is an equidigital number, since it uses as much as digits as its factorization.

127905396651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 127905396651 in words is "one hundred twenty-seven billion, nine hundred five million, three hundred ninety-six thousand, six hundred fifty-one".