128149146808804 has 81 divisors (see below), whose sum is σ = 253362255929769. Its totient is φ = 56671223035680.

The previous prime is 128149146808751. The next prime is 128149146808867. The reversal of 128149146808804 is 408808641941821.

The square root of 128149146808804 is 11320298.

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

It can be written as a sum of positive squares in only one way, i.e., 114669616392100 + 13479530416704 = 10708390^2 + 3671448^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9214715619 + ... + 9214729525.

Almost surely, 2^{128149146808804} is an apocalyptic number.

128149146808804 is the 11320298-th square number.

It is an amenable number.

128149146808804 is a deficient number, since it is larger than the sum of its proper divisors (125213109120965).

128149146808804 is an frugal number, since it uses more digits than its factorization.

128149146808804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27914 (or 13957 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 64.

The spelling of 128149146808804 in words is "one hundred twenty-eight trillion, one hundred forty-nine billion, one hundred forty-six million, eight hundred eight thousand, eight hundred four".