128146158267556 has 81 divisors (see below), whose sum is σ = 266922551598339. Its totient is φ = 53766260433600.

The previous prime is 128146158267553. The next prime is 128146158267563. The reversal of 128146158267556 is 655762851641821.

The square root of 128146158267556 is 11320166.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5432582024100 + 122713576243456 = 2330790^2 + 11077616^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128146158267491 and 128146158267500.

It is not an unprimeable number, because it can be changed into a prime (128146158267553) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3237547686 + ... + 3237587266.

Almost surely, 2^{128146158267556} is an apocalyptic number.

128146158267556 is the 11320166-th square number.

It is an amenable number.

128146158267556 is an abundant number, since it is smaller than the sum of its proper divisors (138776393330783).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128146158267556 is an frugal number, since it uses more digits than its factorization.

128146158267556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79214 (or 39607 counting only the distinct ones).

The product of its digits is 193536000, while the sum is 67.

The spelling of 128146158267556 in words is "one hundred twenty-eight trillion, one hundred forty-six billion, one hundred fifty-eight million, two hundred sixty-seven thousand, five hundred fifty-six".