127773679809 has 16 divisors (see below), whose sum is σ = 179171868672. Its totient is φ = 80837296848.

The previous prime is 127773679801. The next prime is 127773679841. The reversal of 127773679809 is 908976377721.

It is not a de Polignac number, because 127773679809 - 2³ = 127773679801 is a prime.

It is a super-2 number, since 2×127773679809² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 127773679809.

It is not an unprimeable number, because it can be changed into a prime (127773679801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7281759 + ... + 7299284.

It is an arithmetic number, because the mean of its divisors is an integer number (11198241792).

Almost surely, 2^127773679809 is an apocalyptic number.

It is an amenable number.

127773679809 is a deficient number, since it is larger than the sum of its proper divisors (51398188863).

127773679809 is a wasteful number, since it uses less digits than its factorization.

127773679809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14581196.

The product of its (nonzero) digits is 56010528, while the sum is 66.

The spelling of 127773679809 in words is "one hundred twenty-seven billion, seven hundred seventy-three million, six hundred seventy-nine thousand, eight hundred nine".