4356128991 has 16 divisors (see below), whose sum is σ = 5844500480. Its totient is φ = 2885945760.

The previous prime is 4356128969. The next prime is 4356129013. The reversal of 4356128991 is 1998216534.

4356128991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4356128969) and next prime (4356129013).

It is not a de Polignac number, because 4356128991 - 2¹⁹ = 4355604703 is a prime.

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 Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4356128991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4356128911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213986 + ... + 1217568.

It is an arithmetic number, because the mean of its divisors is an integer number (365281280).

Almost surely, 2^4356128991 is an apocalyptic number.

4356128991 is a deficient number, since it is larger than the sum of its proper divisors (1488371489).

4356128991 is a wasteful number, since it uses less digits than its factorization.

4356128991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006.

The product of its digits is 466560, while the sum is 48.

The square root of 4356128991 is about 66000.9771973113. The cubic root of 4356128991 is about 1633.1782108083.

The spelling of 4356128991 in words is "four billion, three hundred fifty-six million, one hundred twenty-eight thousand, nine hundred ninety-one".