128247881744 has 10 divisors (see below), whose sum is σ = 248480270910. Its totient is φ = 64123940864.

The previous prime is 128247881743. The next prime is 128247881753. The reversal of 128247881744 is 447188742821.

It can be written as a sum of positive squares in only one way, i.e., 127763353600 + 484528144 = 357440^2 + 22012^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128247881744.

It is not an unprimeable number, because it can be changed into a prime (128247881743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4007746289 + ... + 4007746320.

It is an arithmetic number, because the mean of its divisors is an integer number (24848027091).

Almost surely, 2^128247881744 is an apocalyptic number.

It is an amenable number.

128247881744 is a deficient number, since it is larger than the sum of its proper divisors (120232389166).

128247881744 is an equidigital number, since it uses as much as digits as its factorization.

128247881744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015492617 (or 8015492611 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 56.

The spelling of 128247881744 in words is "one hundred twenty-eight billion, two hundred forty-seven million, eight hundred eighty-one thousand, seven hundred forty-four".