128007808897 has 2 divisors, whose sum is σ = 128007808898. Its totient is φ = 128007808896.

The previous prime is 128007808889. The next prime is 128007808909. The reversal of 128007808897 is 798808700821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127266281536 + 741527361 = 356744^2 + 27231^2 .

It is a cyclic number.

It is not a de Polignac number, because 128007808897 - 2³ = 128007808889 is a prime.

It is a super-2 number, since 2×128007808897² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128007808597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64003904448 + 64003904449.

It is an arithmetic number, because the mean of its divisors is an integer number (64003904449).

Almost surely, 2^128007808897 is an apocalyptic number.

It is an amenable number.

128007808897 is a deficient number, since it is larger than the sum of its proper divisors (1).

128007808897 is an equidigital number, since it uses as much as digits as its factorization.

128007808897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 58.

The spelling of 128007808897 in words is "one hundred twenty-eight billion, seven million, eight hundred eight thousand, eight hundred ninety-seven".