2145772763 has 2 divisors, whose sum is σ = 2145772764. Its totient is φ = 2145772762.

The previous prime is 2145772751. The next prime is 2145772777. The reversal of 2145772763 is 3672775412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145772763 - 2⁴ = 2145772747 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145772723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072886381 + 1072886382.

It is an arithmetic number, because the mean of its divisors is an integer number (1072886382).

Almost surely, 2^2145772763 is an apocalyptic number.

2145772763 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145772763 is an equidigital number, since it uses as much as digits as its factorization.

2145772763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 44.

The square root of 2145772763 is about 46322.4865804935. The cubic root of 2145772763 is about 1289.8164438465.

The spelling of 2145772763 in words is "two billion, one hundred forty-five million, seven hundred seventy-two thousand, seven hundred sixty-three".