5102661649 has 2 divisors, whose sum is σ = 5102661650. Its totient is φ = 5102661648.

The previous prime is 5102661647. The next prime is 5102661671. The reversal of 5102661649 is 9461662015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4992411649 + 110250000 = 70657^2 + 10500^2 .

It is a cyclic number.

It is not a de Polignac number, because 5102661649 - 2¹ = 5102661647 is a prime.

Together with 5102661647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5102661647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551330824 + 2551330825.

It is an arithmetic number, because the mean of its divisors is an integer number (2551330825).

Almost surely, 2^5102661649 is an apocalyptic number.

It is an amenable number.

5102661649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5102661649 is an equidigital number, since it uses as much as digits as its factorization.

5102661649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 5102661649 is about 71432.9171250902. The cubic root of 5102661649 is about 1721.6000129676.

The spelling of 5102661649 in words is "five billion, one hundred two million, six hundred sixty-one thousand, six hundred forty-nine".