128975641540 has 24 divisors (see below), whose sum is σ = 285104050560. Its totient is φ = 48874979808.

The previous prime is 128975641537. The next prime is 128975641541. The reversal of 128975641540 is 45146579821.

It is a super-2 number, since 2×128975641540² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128975641541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169704412 + ... + 169705171.

It is an arithmetic number, because the mean of its divisors is an integer number (11879335440).

Almost surely, 2^128975641540 is an apocalyptic number.

128975641540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128975641540 is an abundant number, since it is smaller than the sum of its proper divisors (156128409020).

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

128975641540 is a wasteful number, since it uses less digits than its factorization.

128975641540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339409611 (or 339409609 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 128975641540 in words is "one hundred twenty-eight billion, nine hundred seventy-five million, six hundred forty-one thousand, five hundred forty".