128320583101681 has 32 divisors (see below), whose sum is σ = 135586973628288. Its totient is φ = 121304676003840.

The previous prime is 128320583101663. The next prime is 128320583101699. The reversal of 128320583101681 is 186101385023821.

It is an interprime number because it is at equal distance from previous prime (128320583101663) and next prime (128320583101699).

It is a cyclic number.

It is not a de Polignac number, because 128320583101681 - 2¹⁷ = 128320582970609 is a prime.

It is a super-2 number, since 2×128320583101681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128320583101651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1115123910 + ... + 1115238976.

It is an arithmetic number, because the mean of its divisors is an integer number (4237092925884).

Almost surely, 2^{128320583101681} is an apocalyptic number.

It is an amenable number.

128320583101681 is a deficient number, since it is larger than the sum of its proper divisors (7266390526607).

128320583101681 is a wasteful number, since it uses less digits than its factorization.

128320583101681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121201.

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 128320583101681 in words is "one hundred twenty-eight trillion, three hundred twenty billion, five hundred eighty-three million, one hundred one thousand, six hundred eighty-one".