7811200021148 has 6 divisors (see below), whose sum is σ = 13669600037016. Its totient is φ = 3905600010572.

The previous prime is 7811200021147. The next prime is 7811200021169. The reversal of 7811200021148 is 8411200021187.

It is a super-2 number, since 2×7811200021148² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7811200021147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976400002640 + ... + 976400002647.

It is an arithmetic number, because the mean of its divisors is an integer number (2278266672836).

Almost surely, 2^{7811200021148} is an apocalyptic number.

It is an amenable number.

7811200021148 is a deficient number, since it is larger than the sum of its proper divisors (5858400015868).

7811200021148 is a wasteful number, since it uses less digits than its factorization.

7811200021148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952800005291 (or 1952800005289 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The spelling of 7811200021148 in words is "seven trillion, eight hundred eleven billion, two hundred million, twenty-one thousand, one hundred forty-eight".