2128883840729 has 8 divisors (see below), whose sum is σ = 2150190108360. Its totient is φ = 2107582048000.

The previous prime is 2128883840717. The next prime is 2128883840771. The reversal of 2128883840729 is 9270483888212.

It can be written as a sum of positive squares in 4 ways, for example, as 757549159129 + 1371334681600 = 870373^2 + 1171040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128883840729 - 2³⁶ = 2060164363993 is a prime.

It is a super-3 number, since 3×2128883840729³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2128883840779) 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, 158384 + ... + 2069505.

It is an arithmetic number, because the mean of its divisors is an integer number (268773763545).

Almost surely, 2^{2128883840729} is an apocalyptic number.

It is an amenable number.

2128883840729 is a deficient number, since it is larger than the sum of its proper divisors (21306267631).

2128883840729 is a wasteful number, since it uses less digits than its factorization.

2128883840729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237451.

The product of its (nonzero) digits is 24772608, while the sum is 62.

The spelling of 2128883840729 in words is "two trillion, one hundred twenty-eight billion, eight hundred eighty-three million, eight hundred forty thousand, seven hundred twenty-nine".