5163921661 has 8 divisors (see below), whose sum is σ = 5243168448. Its totient is φ = 5084856000.

The previous prime is 5163921559. The next prime is 5163921671. The reversal of 5163921661 is 1661293615.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5163921661 - 2⁷ = 5163921533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5163921671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12741 + ... + 102421.

It is an arithmetic number, because the mean of its divisors is an integer number (655396056).

Almost surely, 2^5163921661 is an apocalyptic number.

It is an amenable number.

5163921661 is a deficient number, since it is larger than the sum of its proper divisors (79246787).

5163921661 is an equidigital number, since it uses as much as digits as its factorization.

5163921661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90563.

The product of its digits is 58320, while the sum is 40.

The square root of 5163921661 is about 71860.4318175169. The cubic root of 5163921661 is about 1728.4621817059.

The spelling of 5163921661 in words is "five billion, one hundred sixty-three million, nine hundred twenty-one thousand, six hundred sixty-one".