128707890543 has 24 divisors (see below), whose sum is σ = 201179491968. Its totient is φ = 82074593304.

The previous prime is 128707890529. The next prime is 128707890601. The reversal of 128707890543 is 345098707821.

It is a happy number.

128707890543 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 0 + 7 + 8 + 90 + 543 = 666.

It is not a de Polignac number, because 128707890543 - 2⁴ = 128707890527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128707890543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128707890503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11508805 + ... + 11519982.

It is an arithmetic number, because the mean of its divisors is an integer number (8382478832).

Almost surely, 2^128707890543 is an apocalyptic number.

128707890543 is a deficient number, since it is larger than the sum of its proper divisors (72471601425).

128707890543 is an equidigital number, since it uses as much as digits as its factorization.

128707890543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23028825 (or 23028813 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 128707890543 in words is "one hundred twenty-eight billion, seven hundred seven million, eight hundred ninety thousand, five hundred forty-three".