128431444256272 has 10 divisors (see below), whose sum is σ = 248835923246558. Its totient is φ = 64215722128128.

The previous prime is 128431444256261. The next prime is 128431444256321. The reversal of 128431444256272 is 272652444134821.

It can be written as a sum of positive squares in only one way, i.e., 125028983636496 + 3402460619776 = 11181636^2 + 1844576^2 .

It is a super-2 number, since 2×128431444256272² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4013482632993 + ... + 4013482633024.

Almost surely, 2^{128431444256272} is an apocalyptic number.

It is an amenable number.

128431444256272 is a deficient number, since it is larger than the sum of its proper divisors (120404478990286).

128431444256272 is an equidigital number, since it uses as much as digits as its factorization.

128431444256272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026965266025 (or 8026965266019 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 55.

The spelling of 128431444256272 in words is "one hundred twenty-eight trillion, four hundred thirty-one billion, four hundred forty-four million, two hundred fifty-six thousand, two hundred seventy-two".