1936561663 has 2 divisors, whose sum is σ = 1936561664. Its totient is φ = 1936561662.

The previous prime is 1936561657. The next prime is 1936561699. The reversal of 1936561663 is 3661656391.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1936561663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1936511663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 968280831 + 968280832.

It is an arithmetic number, because the mean of its divisors is an integer number (968280832).

Almost surely, 2^1936561663 is an apocalyptic number.

1936561663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1936561663 is an equidigital number, since it uses as much as digits as its factorization.

1936561663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 46.

The square root of 1936561663 is about 44006.3820712405. The cubic root of 1936561663 is about 1246.4564522143.

The spelling of 1936561663 in words is "one billion, nine hundred thirty-six million, five hundred sixty-one thousand, six hundred sixty-three".