1516601663 has 2 divisors, whose sum is σ = 1516601664. Its totient is φ = 1516601662.

The previous prime is 1516601659. The next prime is 1516601689. The reversal of 1516601663 is 3661066151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1516601663 - 2² = 1516601659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516601633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758300831 + 758300832.

It is an arithmetic number, because the mean of its divisors is an integer number (758300832).

Almost surely, 2^1516601663 is an apocalyptic number.

1516601663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516601663 is an equidigital number, since it uses as much as digits as its factorization.

1516601663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1516601663 is about 38943.5702395145. The cubic root of 1516601663 is about 1148.9219040579.

The spelling of 1516601663 in words is "one billion, five hundred sixteen million, six hundred one thousand, six hundred sixty-three".