4550537721 has 8 divisors (see below), whose sum is σ = 6070382080. Its totient is φ = 3032192592.

The previous prime is 4550537711. The next prime is 4550537749. The reversal of 4550537721 is 1277350554.

It is a happy number.

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

It is not a de Polignac number, because 4550537721 - 2¹⁵ = 4550504953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4550537721.

It is not an unprimeable number, because it can be changed into a prime (4550537701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367705 + ... + 379878.

It is an arithmetic number, because the mean of its divisors is an integer number (758797760).

Almost surely, 2^4550537721 is an apocalyptic number.

It is an amenable number.

4550537721 is a deficient number, since it is larger than the sum of its proper divisors (1519844359).

4550537721 is a wasteful number, since it uses less digits than its factorization.

4550537721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749615.

The product of its (nonzero) digits is 147000, while the sum is 39.

The square root of 4550537721 is about 67457.6735516427. The cubic root of 4550537721 is about 1657.1210709663.

The spelling of 4550537721 in words is "four billion, five hundred fifty million, five hundred thirty-seven thousand, seven hundred twenty-one".