5599403721 has 40 divisors (see below), whose sum is σ = 8819738400. Its totient is φ = 3530459520.

The previous prime is 5599403717. The next prime is 5599403773. The reversal of 5599403721 is 1273049955.

It is a happy number.

5599403721 is a `hidden beast` number, since 5 + 599 + 4 + 0 + 37 + 21 = 666.

It is not a de Polignac number, because 5599403721 - 2² = 5599403717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5599403321) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1011441 + ... + 1016961.

It is an arithmetic number, because the mean of its divisors is an integer number (220493460).

Almost surely, 2^5599403721 is an apocalyptic number.

It is an amenable number.

5599403721 is a deficient number, since it is larger than the sum of its proper divisors (3220334679).

5599403721 is a wasteful number, since it uses less digits than its factorization.

5599403721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211 (or 6202 counting only the distinct ones).

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

The square root of 5599403721 is about 74829.1635727675. The cubic root of 5599403721 is about 1775.7449728539.

The spelling of 5599403721 in words is "five billion, five hundred ninety-nine million, four hundred three thousand, seven hundred twenty-one".