1036991818661 has 2 divisors, whose sum is σ = 1036991818662. Its totient is φ = 1036991818660.

The previous prime is 1036991818651. The next prime is 1036991818669. The reversal of 1036991818661 is 1668181996301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036973585761 + 18232900 = 1018319^2 + 4270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1036991818661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1036991818661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1036991818669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 518495909330 + 518495909331.

It is an arithmetic number, because the mean of its divisors is an integer number (518495909331).

Almost surely, 2^{1036991818661} is an apocalyptic number.

It is an amenable number.

1036991818661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1036991818661 is an equidigital number, since it uses as much as digits as its factorization.

1036991818661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 59.

The spelling of 1036991818661 in words is "one trillion, thirty-six billion, nine hundred ninety-one million, eight hundred eighteen thousand, six hundred sixty-one".