11658031687609 has 2 divisors, whose sum is σ = 11658031687610. Its totient is φ = 11658031687608.

The previous prime is 11658031687607. The next prime is 11658031687619. The reversal of 11658031687609 is 90678613085611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11479411344384 + 178620343225 = 3388128^2 + 422635^2 .

It is a cyclic number.

It is not a de Polignac number, because 11658031687609 - 2¹ = 11658031687607 is a prime.

Together with 11658031687607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11658031687607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5829015843804 + 5829015843805.

It is an arithmetic number, because the mean of its divisors is an integer number (5829015843805).

Almost surely, 2^{11658031687609} is an apocalyptic number.

It is an amenable number.

11658031687609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11658031687609 is an equidigital number, since it uses as much as digits as its factorization.

11658031687609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 11658031687609 in words is "eleven trillion, six hundred fifty-eight billion, thirty-one million, six hundred eighty-seven thousand, six hundred nine".