3421661563 has 4 divisors (see below), whose sum is σ = 3429385848. Its totient is φ = 3413937280.

The previous prime is 3421661557. The next prime is 3421661567. The reversal of 3421661563 is 3651661243.

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

It is a cyclic number.

It is not a de Polignac number, because 3421661563 - 2²¹ = 3419564411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3421661567) 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, 3861478 + ... + 3862363.

It is an arithmetic number, because the mean of its divisors is an integer number (857346462).

Almost surely, 2^3421661563 is an apocalyptic number.

3421661563 is a deficient number, since it is larger than the sum of its proper divisors (7724285).

3421661563 is an equidigital number, since it uses as much as digits as its factorization.

3421661563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724284.

The product of its digits is 77760, while the sum is 37.

The square root of 3421661563 is about 58494.9704077197. The cubic root of 3421661563 is about 1506.8812085229.

The spelling of 3421661563 in words is "three billion, four hundred twenty-one million, six hundred sixty-one thousand, five hundred sixty-three".