128651513825 has 12 divisors (see below), whose sum is σ = 161547219840. Its totient is φ = 101618409360.

The previous prime is 128651513807. The next prime is 128651513827. The reversal of 128651513825 is 528315156821.

It is not a de Polignac number, because 128651513825 - 2⁸ = 128651513569 is a prime.

It is a super-2 number, since 2×128651513825² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128651513825.

It is not an unprimeable number, because it can be changed into a prime (128651513827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32568029 + ... + 32571978.

It is an arithmetic number, because the mean of its divisors is an integer number (13462268320).

Almost surely, 2^128651513825 is an apocalyptic number.

It is an amenable number.

128651513825 is a deficient number, since it is larger than the sum of its proper divisors (32895706015).

128651513825 is an equidigital number, since it uses as much as digits as its factorization.

128651513825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65140096 (or 65140091 counting only the distinct ones).

The product of its digits is 576000, while the sum is 47.

The spelling of 128651513825 in words is "one hundred twenty-eight billion, six hundred fifty-one million, five hundred thirteen thousand, eight hundred twenty-five".