128663447591192 has 8 divisors (see below), whose sum is σ = 241243964233500. Its totient is φ = 64331723795592.

The previous prime is 128663447591191. The next prime is 128663447591213. The reversal of 128663447591192 is 291195744366821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128663447591191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8041465474442 + ... + 8041465474457.

Almost surely, 2^{128663447591192} is an apocalyptic number.

It is an amenable number.

128663447591192 is a deficient number, since it is larger than the sum of its proper divisors (112580516642308).

128663447591192 is a wasteful number, since it uses less digits than its factorization.

128663447591192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16082930948905 (or 16082930948901 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 68.

The spelling of 128663447591192 in words is "one hundred twenty-eight trillion, six hundred sixty-three billion, four hundred forty-seven million, five hundred ninety-one thousand, one hundred ninety-two".