2489664757 has 2 divisors, whose sum is σ = 2489664758. Its totient is φ = 2489664756.

The previous prime is 2489664623. The next prime is 2489664767. The reversal of 2489664757 is 7574669842.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335975601 + 1153689156 = 36551^2 + 33966^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489664757 - 2³¹ = 342181109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489664767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244832378 + 1244832379.

It is an arithmetic number, because the mean of its divisors is an integer number (1244832379).

Almost surely, 2^2489664757 is an apocalyptic number.

It is an amenable number.

2489664757 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489664757 is an equidigital number, since it uses as much as digits as its factorization.

2489664757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 58.

The square root of 2489664757 is about 49896.5405313835. The cubic root of 2489664757 is about 1355.3359473471.

The spelling of 2489664757 in words is "two billion, four hundred eighty-nine million, six hundred sixty-four thousand, seven hundred fifty-seven".