2646773021 has 4 divisors (see below), whose sum is σ = 2651282592. Its totient is φ = 2642263452.

The previous prime is 2646773009. The next prime is 2646773029. The reversal of 2646773021 is 1203776462.

2646773021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2646773021 - 2³⁰ = 1573031197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646773029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253905 + ... + 2255078.

It is an arithmetic number, because the mean of its divisors is an integer number (662820648).

Almost surely, 2^2646773021 is an apocalyptic number.

It is an amenable number.

2646773021 is a deficient number, since it is larger than the sum of its proper divisors (4509571).

2646773021 is an equidigital number, since it uses as much as digits as its factorization.

2646773021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509570.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 2646773021 is about 51446.7979664430. The cubic root of 2646773021 is about 1383.2655670228.

The spelling of 2646773021 in words is "two billion, six hundred forty-six million, seven hundred seventy-three thousand, twenty-one".