128980409744 has 40 divisors (see below), whose sum is σ = 262058163960. Its totient is φ = 61413424128.

The previous prime is 128980409729. The next prime is 128980409771. The reversal of 128980409744 is 447904089821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47127199744 + 81853210000 = 217088^2 + 286100^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128980409744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870067 + ... + 1937810.

It is an arithmetic number, because the mean of its divisors is an integer number (6551454099).

Almost surely, 2^128980409744 is an apocalyptic number.

It is an amenable number.

128980409744 is an abundant number, since it is smaller than the sum of its proper divisors (133077754216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128980409744 is a wasteful number, since it uses less digits than its factorization.

128980409744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807987 (or 3807981 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 128980409744 in words is "one hundred twenty-eight billion, nine hundred eighty million, four hundred nine thousand, seven hundred forty-four".