128959400740 has 24 divisors (see below), whose sum is σ = 270823630392. Its totient is φ = 51582067200.

The previous prime is 128959400719. The next prime is 128959400743. The reversal of 128959400740 is 47004959821.

It can be written as a sum of positive squares in 4 ways, for example, as 10793963236 + 118165437504 = 103894^2 + 343752^2 .

It is not an unprimeable number, because it can be changed into a prime (128959400743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650652 + ... + 825388.

It is an arithmetic number, because the mean of its divisors is an integer number (11284317933).

Almost surely, 2^128959400740 is an apocalyptic number.

128959400740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128959400740 is an abundant number, since it is smaller than the sum of its proper divisors (141864229652).

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

128959400740 is a wasteful number, since it uses less digits than its factorization.

128959400740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211647 (or 211645 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 128959400740 in words is "one hundred twenty-eight billion, nine hundred fifty-nine million, four hundred thousand, seven hundred forty".