128710532509901 has 4 divisors (see below), whose sum is σ = 128714510860572. Its totient is φ = 128706554159232.

The previous prime is 128710532509847. The next prime is 128710532509969. The reversal of 128710532509901 is 109905235017821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47711000509225 + 80999532000676 = 6907315^2 + 8999974^2 .

It is a cyclic number.

It is not a de Polignac number, because 128710532509901 - 2¹⁸ = 128710532247757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128710532509981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989126806 + ... + 1989191511.

It is an arithmetic number, because the mean of its divisors is an integer number (32178627715143).

Almost surely, 2^{128710532509901} is an apocalyptic number.

It is an amenable number.

128710532509901 is a deficient number, since it is larger than the sum of its proper divisors (3978350671).

128710532509901 is an equidigital number, since it uses as much as digits as its factorization.

128710532509901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978350670.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 128710532509901 in words is "one hundred twenty-eight trillion, seven hundred ten billion, five hundred thirty-two million, five hundred nine thousand, nine hundred one".