2646163021 has 8 divisors (see below), whose sum is σ = 2655689400. Its totient is φ = 2636648448.

The previous prime is 2646163019. The next prime is 2646163049. The reversal of 2646163021 is 1203616462.

It can be written as a sum of positive squares in 4 ways, for example, as 2299682025 + 346480996 = 47955^2 + 18614^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2646163021 - 2¹ = 2646163019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646163321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841965 + ... + 845101.

It is an arithmetic number, because the mean of its divisors is an integer number (331961175).

Almost surely, 2^2646163021 is an apocalyptic number.

It is an amenable number.

2646163021 is a deficient number, since it is larger than the sum of its proper divisors (9526379).

2646163021 is a wasteful number, since it uses less digits than its factorization.

2646163021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2646163021 is about 51440.8691703396. The cubic root of 2646163021 is about 1383.1592920960.

Adding to 2646163021 its reverse (1203616462), we get a palindrome (3849779483).

The spelling of 2646163021 in words is "two billion, six hundred forty-six million, one hundred sixty-three thousand, twenty-one".