5361659721 has 24 divisors (see below), whose sum is σ = 8587188480. Its totient is φ = 3196216800.

The previous prime is 5361659717. The next prime is 5361659741. The reversal of 5361659721 is 1279561635.

5361659721 is a `hidden beast` number, since 5 + 3 + 616 + 5 + 9 + 7 + 21 = 666.

It is not a de Polignac number, because 5361659721 - 2² = 5361659717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5361659741) 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 23 ways as a sum of consecutive naturals, for example, 437881 + ... + 449958.

It is an arithmetic number, because the mean of its divisors is an integer number (357799520).

Almost surely, 2^5361659721 is an apocalyptic number.

It is an amenable number.

5361659721 is a deficient number, since it is larger than the sum of its proper divisors (3225528759).

5361659721 is a wasteful number, since it uses less digits than its factorization.

5361659721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887917 (or 887914 counting only the distinct ones).

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

The square root of 5361659721 is about 73223.3550241998. The cubic root of 5361659721 is about 1750.2486417867.

The spelling of 5361659721 in words is "five billion, three hundred sixty-one million, six hundred fifty-nine thousand, seven hundred twenty-one".