128396880125 has 16 divisors (see below), whose sum is σ = 165764804400. Its totient is φ = 99175518400.

The previous prime is 128396880047. The next prime is 128396880167. The reversal of 128396880125 is 521088693821.

It can be written as a sum of positive squares in 8 ways, for example, as 28567422361 + 99829457764 = 169019^2 + 315958^2 .

It is not a de Polignac number, because 128396880125 - 2¹⁴ = 128396863741 is a prime.

It is a congruent number.

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, 17706290 + ... + 17713539.

It is an arithmetic number, because the mean of its divisors is an integer number (10360300275).

Almost surely, 2^128396880125 is an apocalyptic number.

It is an amenable number.

128396880125 is a deficient number, since it is larger than the sum of its proper divisors (37367924275).

128396880125 is an equidigital number, since it uses as much as digits as its factorization.

128396880125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35419873 (or 35419863 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 128396880125 in words is "one hundred twenty-eight billion, three hundred ninety-six million, eight hundred eighty thousand, one hundred twenty-five".