128911317703744 has 21 divisors (see below), whose sum is σ = 255808576311847. Its totient is φ = 64455613436224.

The previous prime is 128911317703717. The next prime is 128911317703771. The reversal of 128911317703744 is 447307713119821.

The square root of 128911317703744 is 11353912.

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

It is an interprime number because it is at equal distance from previous prime (128911317703717) and next prime (128911317703771).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 90121677 + ... + 91540915.

Almost surely, 2^{128911317703744} is an apocalyptic number.

128911317703744 is the 11353912-nd square number.

It is an amenable number.

128911317703744 is a deficient number, since it is larger than the sum of its proper divisors (126897258608103).

128911317703744 is an frugal number, since it uses more digits than its factorization.

128911317703744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838490 (or 1419241 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 128911317703744 in words is "one hundred twenty-eight trillion, nine hundred eleven billion, three hundred seventeen million, seven hundred three thousand, seven hundred forty-four".