1079821464661 has 2 divisors, whose sum is σ = 1079821464662. Its totient is φ = 1079821464660.

The previous prime is 1079821464649. The next prime is 1079821464697. The reversal of 1079821464661 is 1664641289701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844412128561 + 235409336100 = 918919^2 + 485190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1079821464661 - 2¹¹ = 1079821462613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1079821467661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539910732330 + 539910732331.

It is an arithmetic number, because the mean of its divisors is an integer number (539910732331).

Almost surely, 2^{1079821464661} is an apocalyptic number.

It is an amenable number.

1079821464661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1079821464661 is an equidigital number, since it uses as much as digits as its factorization.

1079821464661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1079821464661 in words is "one trillion, seventy-nine billion, eight hundred twenty-one million, four hundred sixty-four thousand, six hundred sixty-one".