6562619421121 has 3 divisors (see below), whose sum is σ = 6562621982883. Its totient is φ = 6562616859360.

The previous prime is 6562619421109. The next prime is 6562619421139. The reversal of 6562619421121 is 1211249162656.

The square root of 6562619421121 is 2561761.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5200730421121 + 1361889000000 = 2280511^2 + 1167000^2 .

It is not a de Polignac number, because 6562619421121 - 2⁵ = 6562619421089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6562619421221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1280881 + ... + 3842641.

It is an arithmetic number, because the mean of its divisors is an integer number (2187540660961).

Almost surely, 2^{6562619421121} is an apocalyptic number.

6562619421121 is the 2561761-st square number.

6562619421121 is the 1280881-st centered octagonal number.

It is an amenable number.

6562619421121 is a deficient number, since it is larger than the sum of its proper divisors (2561762).

6562619421121 is an frugal number, since it uses more digits than its factorization.

6562619421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123522 (or 2561761 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The spelling of 6562619421121 in words is "six trillion, five hundred sixty-two billion, six hundred nineteen million, four hundred twenty-one thousand, one hundred twenty-one".