128037516681 has 16 divisors (see below), whose sum is σ = 174889414656. Its totient is φ = 83276585616.

The previous prime is 128037516679. The next prime is 128037516683. The reversal of 128037516681 is 186615730821.

It is an interprime number because it is at equal distance from previous prime (128037516679) and next prime (128037516683).

It is not a de Polignac number, because 128037516681 - 2¹ = 128037516679 is a prime.

It is a super-2 number, since 2×128037516681² (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 128037516681.

It is not an unprimeable number, because it can be changed into a prime (128037516683) 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, 463725 + ... + 686378.

It is an arithmetic number, because the mean of its divisors is an integer number (10930588416).

Almost surely, 2^128037516681 is an apocalyptic number.

It is an amenable number.

128037516681 is a deficient number, since it is larger than the sum of its proper divisors (46851897975).

128037516681 is a wasteful number, since it uses less digits than its factorization.

128037516681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151012.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 128037516681 in words is "one hundred twenty-eight billion, thirty-seven million, five hundred sixteen thousand, six hundred eighty-one".