1024644661 has 2 divisors, whose sum is σ = 1024644662. Its totient is φ = 1024644660.

The previous prime is 1024644623. The next prime is 1024644671. The reversal of 1024644661 is 1664464201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986588100 + 38056561 = 31410^2 + 6169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024644661 - 2¹³ = 1024636469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1024644611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512322330 + 512322331.

It is an arithmetic number, because the mean of its divisors is an integer number (512322331).

Almost surely, 2^1024644661 is an apocalyptic number.

It is an amenable number.

1024644661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024644661 is an equidigital number, since it uses as much as digits as its factorization.

1024644661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 1024644661 is about 32010.0712432822. The cubic root of 1024644661 is about 1008.1483116811.

The spelling of 1024644661 in words is "one billion, twenty-four million, six hundred forty-four thousand, six hundred sixty-one".