128205512606 has 16 divisors (see below), whose sum is σ = 201790569600. Its totient is φ = 60973130328.

The previous prime is 128205512587. The next prime is 128205512639. The reversal of 128205512606 is 606215502821.

It is a super-2 number, since 2×128205512606² (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 128205512606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7776896 + ... + 7793363.

It is an arithmetic number, because the mean of its divisors is an integer number (12611910600).

Almost surely, 2^128205512606 is an apocalyptic number.

128205512606 is a deficient number, since it is larger than the sum of its proper divisors (73585056994).

128205512606 is a wasteful number, since it uses less digits than its factorization.

128205512606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15570463.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 128205512606 in words is "one hundred twenty-eight billion, two hundred five million, five hundred twelve thousand, six hundred six".