128630539801 has 27 divisors (see below), whose sum is σ = 134420057373. Its totient is φ = 123089023200.

The previous prime is 128630539711. The next prime is 128630539811. The reversal of 128630539801 is 108935036821.

The square root of 128630539801 is 358651.

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 68102731225 + 60527808576 = 260965^2 + 246024^2 .

It is not a de Polignac number, because 128630539801 - 2³⁵ = 94270801433 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128630539811) 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, 1273569651 + ... + 1273569751.

Almost surely, 2^128630539801 is an apocalyptic number.

128630539801 is the 358651-st square number.

128630539801 is the 179326-th centered octagonal number.

It is an amenable number.

128630539801 is a deficient number, since it is larger than the sum of its proper divisors (5789517572).

128630539801 is an frugal number, since it uses more digits than its factorization.

128630539801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 128630539801 in words is "one hundred twenty-eight billion, six hundred thirty million, five hundred thirty-nine thousand, eight hundred one".