2650332721 has 2 divisors, whose sum is σ = 2650332722. Its totient is φ = 2650332720.

The previous prime is 2650332719. The next prime is 2650332749. The reversal of 2650332721 is 1272330562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1492972321 + 1157360400 = 38639^2 + 34020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650332721 - 2¹ = 2650332719 is a prime.

Together with 2650332719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2650332761) 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 as a sum of consecutive naturals, namely, 1325166360 + 1325166361.

It is an arithmetic number, because the mean of its divisors is an integer number (1325166361).

Almost surely, 2^2650332721 is an apocalyptic number.

It is an amenable number.

2650332721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650332721 is an equidigital number, since it uses as much as digits as its factorization.

2650332721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 2650332721 is about 51481.3822755372. The cubic root of 2650332721 is about 1383.8854167517.

The spelling of 2650332721 in words is "two billion, six hundred fifty million, three hundred thirty-two thousand, seven hundred twenty-one".