6201720001 has 9 divisors (see below), whose sum is σ = 6309941859. Its totient is φ = 6095327400.

The previous prime is 6201719981. The next prime is 6201720011. The reversal of 6201720001 is 1000271026.

The square root of 6201720001 is 78751.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 201668401 + 6000051600 = 14201^2 + 77460^2 .

It is not a de Polignac number, because 6201720001 - 2¹⁹ = 6201195713 is a prime.

It is a super-2 number, since 2×6201720001² = 76922661941606880002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6201720011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4803166 + ... + 4804456.

It is an arithmetic number, because the mean of its divisors is an integer number (701104651).

Almost surely, 2^6201720001 is an apocalyptic number.

6201720001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6201720001 is the 78751-st square number.

6201720001 is the 39376-th centered octagonal number.

It is an amenable number.

6201720001 is a deficient number, since it is larger than the sum of its proper divisors (108221858).

6201720001 is an frugal number, since it uses more digits than its factorization.

6201720001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The cubic root of 6201720001 is about 1837.2604158976.

Adding to 6201720001 its reverse (1000271026), we get a palindrome (7201991027).

The spelling of 6201720001 in words is "six billion, two hundred one million, seven hundred twenty thousand, one".