21622136144761 has 4 divisors (see below), whose sum is σ = 21652980847524. Its totient is φ = 21591291442000.

The previous prime is 21622136144743. The next prime is 21622136144797. The reversal of 21622136144761 is 16744163122612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12738046521600 + 8884089623161 = 3569040^2 + 2980619^2 .

It is a cyclic number.

It is not a de Polignac number, because 21622136144761 - 2¹⁹ = 21622135620473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622136141761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15422350330 + ... + 15422351731.

It is an arithmetic number, because the mean of its divisors is an integer number (5413245211881).

Almost surely, 2^{21622136144761} is an apocalyptic number.

It is an amenable number.

21622136144761 is a deficient number, since it is larger than the sum of its proper divisors (30844702763).

21622136144761 is an equidigital number, since it uses as much as digits as its factorization.

21622136144761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30844702762.

The product of its digits is 580608, while the sum is 46.

The spelling of 21622136144761 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred thirty-six million, one hundred forty-four thousand, seven hundred sixty-one".