2128779634652 has 96 divisors (see below), whose sum is σ = 4232538261504. Its totient is φ = 928352422400.

The previous prime is 2128779634571. The next prime is 2128779634669. The reversal of 2128779634652 is 2564369778212.

It is a super-2 number, since 2×2128779634652² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134037752 + ... + 134053632.

It is an arithmetic number, because the mean of its divisors is an integer number (44088940224).

Almost surely, 2^{2128779634652} is an apocalyptic number.

2128779634652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2128779634652 is a deficient number, since it is larger than the sum of its proper divisors (2103758626852).

2128779634652 is a wasteful number, since it uses less digits than its factorization.

2128779634652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17219 (or 17217 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The spelling of 2128779634652 in words is "two trillion, one hundred twenty-eight billion, seven hundred seventy-nine million, six hundred thirty-four thousand, six hundred fifty-two".