2646646051 has 4 divisors (see below), whose sum is σ = 3024738352. Its totient is φ = 2268553752.

The previous prime is 2646646043. The next prime is 2646646061. The reversal of 2646646051 is 1506466462.

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

It is a cyclic number.

It is not a de Polignac number, because 2646646051 - 2³ = 2646646043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2646645995 and 2646646013.

It is not an unprimeable number, because it can be changed into a prime (2646646061) 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, 189046140 + ... + 189046153.

It is an arithmetic number, because the mean of its divisors is an integer number (756184588).

Almost surely, 2^2646646051 is an apocalyptic number.

2646646051 is a deficient number, since it is larger than the sum of its proper divisors (378092301).

2646646051 is an equidigital number, since it uses as much as digits as its factorization.

2646646051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378092300.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 2646646051 is about 51445.5639584211. The cubic root of 2646646051 is about 1383.2434475039.

The spelling of 2646646051 in words is "two billion, six hundred forty-six million, six hundred forty-six thousand, fifty-one".