128651243065 has 16 divisors (see below), whose sum is σ = 156153623040. Its totient is φ = 101740129920.

The previous prime is 128651243053. The next prime is 128651243093. The reversal of 128651243065 is 560342156821.

It is not a de Polignac number, because 128651243065 - 2⁹ = 128651242553 is a prime.

It is a super-2 number, since 2×128651243065² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1946410 + ... + 2011420.

It is an arithmetic number, because the mean of its divisors is an integer number (9759601440).

Almost surely, 2^128651243065 is an apocalyptic number.

It is an amenable number.

128651243065 is a deficient number, since it is larger than the sum of its proper divisors (27502379975).

128651243065 is an equidigital number, since it uses as much as digits as its factorization.

128651243065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69552.

The product of its (nonzero) digits is 345600, while the sum is 43.

Adding to 128651243065 its reverse (560342156821), we get a palindrome (688993399886).

The spelling of 128651243065 in words is "one hundred twenty-eight billion, six hundred fifty-one million, two hundred forty-three thousand, sixty-five".