2646794281 has 2 divisors, whose sum is σ = 2646794282. Its totient is φ = 2646794280.

The previous prime is 2646794273. The next prime is 2646794317. The reversal of 2646794281 is 1824976462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1945603881 + 701190400 = 44109^2 + 26480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646794281 - 2³ = 2646794273 is a prime.

It is a super-2 number, since 2×2646794281² = 14011039931868613922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2646794201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323397140 + 1323397141.

It is an arithmetic number, because the mean of its divisors is an integer number (1323397141).

Almost surely, 2^2646794281 is an apocalyptic number.

It is an amenable number.

2646794281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646794281 is an equidigital number, since it uses as much as digits as its factorization.

2646794281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 2646794281 is about 51447.0045872449. The cubic root of 2646794281 is about 1383.2692706708.

The spelling of 2646794281 in words is "two billion, six hundred forty-six million, seven hundred ninety-four thousand, two hundred eighty-one".