2128730772646 has 8 divisors (see below), whose sum is σ = 3193103424600. Its totient is φ = 1064362964448.

The previous prime is 2128730772607. The next prime is 2128730772673. The reversal of 2128730772646 is 6462770378212.

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

It is a super-2 number, since 2×2128730772646² (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 3 ways as a sum of consecutive naturals, for example, 231310 + ... + 2076286.

It is an arithmetic number, because the mean of its divisors is an integer number (399137928075).

Almost surely, 2^{2128730772646} is an apocalyptic number.

2128730772646 is a deficient number, since it is larger than the sum of its proper divisors (1064372651954).

2128730772646 is a wasteful number, since it uses less digits than its factorization.

2128730772646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421878.

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 2128730772646 in words is "two trillion, one hundred twenty-eight billion, seven hundred thirty million, seven hundred seventy-two thousand, six hundred forty-six".