16721553301 has 12 divisors (see below), whose sum is σ = 17205696480. Its totient is φ = 16250693040.

The previous prime is 16721553287. The next prime is 16721553349. The reversal of 16721553301 is 10335512761.

It is not a de Polignac number, because 16721553301 - 2⁹ = 16721552789 is a prime.

It is a super-2 number, since 2×16721553301² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721553391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1251466 + ... + 1264756.

It is an arithmetic number, because the mean of its divisors is an integer number (1433808040).

Almost surely, 2^16721553301 is an apocalyptic number.

It is an amenable number.

16721553301 is a deficient number, since it is larger than the sum of its proper divisors (484143179).

16721553301 is an equidigital number, since it uses as much as digits as its factorization.

16721553301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14284 (or 14247 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 16721553301 in words is "sixteen billion, seven hundred twenty-one million, five hundred fifty-three thousand, three hundred one".