19047186161 has 2 divisors, whose sum is σ = 19047186162. Its totient is φ = 19047186160.

The previous prime is 19047186083. The next prime is 19047186181. The reversal of 19047186161 is 16168174091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17710552561 + 1336633600 = 133081^2 + 36560^2 .

It is a cyclic number.

It is not a de Polignac number, because 19047186161 - 2²² = 19042991857 is a prime.

It is not a weakly prime, because it can be changed into another prime (19047186181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9523593080 + 9523593081.

It is an arithmetic number, because the mean of its divisors is an integer number (9523593081).

Almost surely, 2^19047186161 is an apocalyptic number.

It is an amenable number.

19047186161 is a deficient number, since it is larger than the sum of its proper divisors (1).

19047186161 is an equidigital number, since it uses as much as digits as its factorization.

19047186161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 19047186161 in words is "nineteen billion, forty-seven million, one hundred eighty-six thousand, one hundred sixty-one".