11801511504709 has 2 divisors, whose sum is σ = 11801511504710. Its totient is φ = 11801511504708.

The previous prime is 11801511504637. The next prime is 11801511504743. The reversal of 11801511504709 is 90740511510811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8119775628484 + 3681735876225 = 2849522^2 + 1918785^2 .

It is a cyclic number.

It is not a de Polignac number, because 11801511504709 - 2¹¹ = 11801511502661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11801511504799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5900755752354 + 5900755752355.

It is an arithmetic number, because the mean of its divisors is an integer number (5900755752355).

Almost surely, 2^{11801511504709} is an apocalyptic number.

It is an amenable number.

11801511504709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11801511504709 is an equidigital number, since it uses as much as digits as its factorization.

11801511504709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 43.

The spelling of 11801511504709 in words is "eleven trillion, eight hundred one billion, five hundred eleven million, five hundred four thousand, seven hundred nine".