2489664451 has 2 divisors, whose sum is σ = 2489664452. Its totient is φ = 2489664450.

The previous prime is 2489664409. The next prime is 2489664469. The reversal of 2489664451 is 1544669842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2489664451 - 2³¹ = 342180803 is a prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2489664395 and 2489664404.

It is not a weakly prime, because it can be changed into another prime (2489664481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244832225 + 1244832226.

It is an arithmetic number, because the mean of its divisors is an integer number (1244832226).

Almost surely, 2^2489664451 is an apocalyptic number.

2489664451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489664451 is an equidigital number, since it uses as much as digits as its factorization.

2489664451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 49.

The square root of 2489664451 is about 49896.5374650386. The cubic root of 2489664451 is about 1355.3358918198.

The spelling of 2489664451 in words is "two billion, four hundred eighty-nine million, six hundred sixty-four thousand, four hundred fifty-one".