1965163563 has 48 divisors (see below), whose sum is σ = 3250990080. Its totient is φ = 1132948800.

The previous prime is 1965163549. The next prime is 1965163663. The reversal of 1965163563 is 3653615691.

1965163563 is a `hidden beast` number, since 1 + 9 + 6 + 5 + 1 + 635 + 6 + 3 = 666.

It is not a de Polignac number, because 1965163563 - 2⁵ = 1965163531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1965163663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175645 + ... + 186497.

It is an arithmetic number, because the mean of its divisors is an integer number (67728960).

Almost surely, 2^1965163563 is an apocalyptic number.

1965163563 is a deficient number, since it is larger than the sum of its proper divisors (1285826517).

1965163563 is a wasteful number, since it uses less digits than its factorization.

1965163563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10960 (or 10957 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 1965163563 is about 44330.1653843069. The cubic root of 1965163563 is about 1252.5629681372.

The spelling of 1965163563 in words is "one billion, nine hundred sixty-five million, one hundred sixty-three thousand, five hundred sixty-three".