128708099522 has 6 divisors (see below), whose sum is σ = 193062910329. Its totient is φ = 64353796080.

The previous prime is 128708099479. The next prime is 128708099539. The reversal of 128708099522 is 225990807821.

It can be written as a sum of positive squares in 2 ways, for example, as 127398311041 + 1309788481 = 356929^2 + 36191^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253681.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 380522 + ... + 634202.

Almost surely, 2^128708099522 is an apocalyptic number.

128708099522 is a deficient number, since it is larger than the sum of its proper divisors (64354810807).

128708099522 is an frugal number, since it uses more digits than its factorization.

128708099522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507364 (or 253683 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 128708099522 in words is "one hundred twenty-eight billion, seven hundred eight million, ninety-nine thousand, five hundred twenty-two".