11709187643 has 2 divisors, whose sum is σ = 11709187644. Its totient is φ = 11709187642.

The previous prime is 11709187579. The next prime is 11709187687. The reversal of 11709187643 is 34678190711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11709187643 - 2⁶ = 11709187579 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11709187043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5854593821 + 5854593822.

It is an arithmetic number, because the mean of its divisors is an integer number (5854593822).

Almost surely, 2^11709187643 is an apocalyptic number.

11709187643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11709187643 is an equidigital number, since it uses as much as digits as its factorization.

11709187643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 11709187643 in words is "eleven billion, seven hundred nine million, one hundred eighty-seven thousand, six hundred forty-three".