2159761563 has 10 divisors (see below), whose sum is σ = 3226310604. Its totient is φ = 1439840988.

The previous prime is 2159761561. The next prime is 2159761601. The reversal of 2159761563 is 3651679512.

2159761563 is a `hidden beast` number, since 2 + 1 + 597 + 6 + 1 + 56 + 3 = 666.

It is not a de Polignac number, because 2159761563 - 2¹ = 2159761561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159761561) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13331781 + ... + 13331942.

Almost surely, 2^2159761563 is an apocalyptic number.

2159761563 is a deficient number, since it is larger than the sum of its proper divisors (1066549041).

2159761563 is an equidigital number, since it uses as much as digits as its factorization.

2159761563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26663735 (or 26663726 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 2159761563 is about 46473.2349099995. The cubic root of 2159761563 is about 1292.6132477370.

The spelling of 2159761563 in words is "two billion, one hundred fifty-nine million, seven hundred sixty-one thousand, five hundred sixty-three".