1611789563 has 2 divisors, whose sum is σ = 1611789564. Its totient is φ = 1611789562.

The previous prime is 1611789481. The next prime is 1611789577. The reversal of 1611789563 is 3659871161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1611789563 - 2¹⁶ = 1611724027 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611789593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805894781 + 805894782.

It is an arithmetic number, because the mean of its divisors is an integer number (805894782).

Almost surely, 2^1611789563 is an apocalyptic number.

1611789563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611789563 is an equidigital number, since it uses as much as digits as its factorization.

1611789563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1611789563 is about 40147.0990608288. The cubic root of 1611789563 is about 1172.4728090645.

The spelling of 1611789563 in words is "one billion, six hundred eleven million, seven hundred eighty-nine thousand, five hundred sixty-three".