2189961563 has 4 divisors (see below), whose sum is σ = 2190132000. Its totient is φ = 2189791128.

The previous prime is 2189961523. The next prime is 2189961581. The reversal of 2189961563 is 3651699812.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189961563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2189961523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64220 + ... + 92217.

It is an arithmetic number, because the mean of its divisors is an integer number (547533000).

Almost surely, 2^2189961563 is an apocalyptic number.

2189961563 is a deficient number, since it is larger than the sum of its proper divisors (170437).

2189961563 is a wasteful number, since it uses less digits than its factorization.

2189961563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170436.

The product of its digits is 699840, while the sum is 50.

The square root of 2189961563 is about 46797.0251511781. The cubic root of 2189961563 is about 1298.6102629872.

The spelling of 2189961563 in words is "two billion, one hundred eighty-nine million, nine hundred sixty-one thousand, five hundred sixty-three".