6821128458145 has 64 divisors (see below), whose sum is σ = 8875846575360. Its totient is φ = 5016378470400.

The previous prime is 6821128458119. The next prime is 6821128458161. The reversal of 6821128458145 is 5418548211286.

It is not a de Polignac number, because 6821128458145 - 2²³ = 6821120069537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381464605 + ... + 381482485.

It is an arithmetic number, because the mean of its divisors is an integer number (138685102740).

Almost surely, 2^{6821128458145} is an apocalyptic number.

It is an amenable number.

6821128458145 is a deficient number, since it is larger than the sum of its proper divisors (2054718117215).

6821128458145 is a wasteful number, since it uses less digits than its factorization.

6821128458145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18866.

The product of its digits is 4915200, while the sum is 55.

The spelling of 6821128458145 in words is "six trillion, eight hundred twenty-one billion, one hundred twenty-eight million, four hundred fifty-eight thousand, one hundred forty-five".