2645429081 has 2 divisors, whose sum is σ = 2645429082. Its totient is φ = 2645429080.

The previous prime is 2645429077. The next prime is 2645429089. The reversal of 2645429081 is 1809245462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2334435856 + 310993225 = 48316^2 + 17635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645429081 - 2² = 2645429077 is a prime.

It is a super-2 number, since 2×2645429081² = 13996590045201009122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2645429089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322714540 + 1322714541.

It is an arithmetic number, because the mean of its divisors is an integer number (1322714541).

Almost surely, 2^2645429081 is an apocalyptic number.

It is an amenable number.

2645429081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645429081 is an equidigital number, since it uses as much as digits as its factorization.

2645429081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 2645429081 is about 51433.7348536931. The cubic root of 2645429081 is about 1383.0314025452.

The spelling of 2645429081 in words is "two billion, six hundred forty-five million, four hundred twenty-nine thousand, eighty-one".