128863766743977 has 8 divisors (see below), whose sum is σ = 171893287353664. Its totient is φ = 85871711981808.

The previous prime is 128863766743931. The next prime is 128863766743981. The reversal of 128863766743977 is 779347667368821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128863766743977 - 2⁶ = 128863766743913 is a prime.

It is a super-2 number, since 2×128863766743977² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128863766743977.

It is not an unprimeable number, because it can be changed into a prime (128863766743477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9366453853 + ... + 9366467610.

It is an arithmetic number, because the mean of its divisors is an integer number (21486660919208).

Almost surely, 2^{128863766743977} is an apocalyptic number.

It is an amenable number.

128863766743977 is a deficient number, since it is larger than the sum of its proper divisors (43029520609687).

128863766743977 is a wasteful number, since it uses less digits than its factorization.

128863766743977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18732923759.

The product of its digits is 21508042752, while the sum is 84.

The spelling of 128863766743977 in words is "one hundred twenty-eight trillion, eight hundred sixty-three billion, seven hundred sixty-six million, seven hundred forty-three thousand, nine hundred seventy-seven".