128473640742 has 32 divisors (see below), whose sum is σ = 260813464704. Its totient is φ = 42180336000.

The previous prime is 128473640723. The next prime is 128473640749. The reversal of 128473640742 is 247046374821.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 128473640691 and 128473640700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128473640749) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4972317 + ... + 4998087.

It is an arithmetic number, because the mean of its divisors is an integer number (8150420772).

Almost surely, 2^128473640742 is an apocalyptic number.

128473640742 is an abundant number, since it is smaller than the sum of its proper divisors (132339823962).

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

128473640742 is a wasteful number, since it uses less digits than its factorization.

128473640742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38244.

The product of its (nonzero) digits is 1806336, while the sum is 48.

The spelling of 128473640742 in words is "one hundred twenty-eight billion, four hundred seventy-three million, six hundred forty thousand, seven hundred forty-two".