6555201021723 has 4 divisors (see below), whose sum is σ = 8740268028968. Its totient is φ = 4370134014480.

The previous prime is 6555201021671. The next prime is 6555201021793. The reversal of 6555201021723 is 3271201025556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6555201021723 - 2⁶ = 6555201021659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6555201021793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092533503618 + ... + 1092533503623.

It is an arithmetic number, because the mean of its divisors is an integer number (2185067007242).

Almost surely, 2^{6555201021723} is an apocalyptic number.

6555201021723 is a deficient number, since it is larger than the sum of its proper divisors (2185067007245).

6555201021723 is a wasteful number, since it uses less digits than its factorization.

6555201021723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185067007244.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 6555201021723 in words is "six trillion, five hundred fifty-five billion, two hundred one million, twenty-one thousand, seven hundred twenty-three".