187064609009 has 2 divisors, whose sum is σ = 187064609010. Its totient is φ = 187064609008.

The previous prime is 187064608943. The next prime is 187064609057. The reversal of 187064609009 is 900906460781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178276483984 + 8788125025 = 422228^2 + 93745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187064609009 is a prime.

It is not a weakly prime, because it can be changed into another prime (187064609609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93532304504 + 93532304505.

It is an arithmetic number, because the mean of its divisors is an integer number (93532304505).

Almost surely, 2^187064609009 is an apocalyptic number.

It is an amenable number.

187064609009 is a deficient number, since it is larger than the sum of its proper divisors (1).

187064609009 is an equidigital number, since it uses as much as digits as its factorization.

187064609009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 187064609009 in words is "one hundred eighty-seven billion, sixty-four million, six hundred nine thousand, nine".