11766642493 has 2 divisors, whose sum is σ = 11766642494. Its totient is φ = 11766642492.

The previous prime is 11766642469. The next prime is 11766642523. The reversal of 11766642493 is 39424666711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9361917049 + 2404725444 = 96757^2 + 49038^2 .

It is a cyclic number.

It is not a de Polignac number, because 11766642493 - 2²¹ = 11764545341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11766642893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5883321246 + 5883321247.

It is an arithmetic number, because the mean of its divisors is an integer number (5883321247).

Almost surely, 2^11766642493 is an apocalyptic number.

It is an amenable number.

11766642493 is a deficient number, since it is larger than the sum of its proper divisors (1).

11766642493 is an equidigital number, since it uses as much as digits as its factorization.

11766642493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The spelling of 11766642493 in words is "eleven billion, seven hundred sixty-six million, six hundred forty-two thousand, four hundred ninety-three".