127215899979 has 64 divisors (see below), whose sum is σ = 206709104640. Its totient is φ = 68050575360.

The previous prime is 127215899963. The next prime is 127215900011. The reversal of 127215899979 is 979998512721.

It is not a de Polignac number, because 127215899979 - 2⁴ = 127215899963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127215899929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4151787 + ... + 4182315.

It is an arithmetic number, because the mean of its divisors is an integer number (3229829760).

Almost surely, 2^127215899979 is an apocalyptic number.

127215899979 is a deficient number, since it is larger than the sum of its proper divisors (79493204661).

127215899979 is a wasteful number, since it uses less digits than its factorization.

127215899979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30780.

The product of its digits is 51438240, while the sum is 69.

The spelling of 127215899979 in words is "one hundred twenty-seven billion, two hundred fifteen million, eight hundred ninety-nine thousand, nine hundred seventy-nine".