64782161489 has 2 divisors, whose sum is σ = 64782161490. Its totient is φ = 64782161488.

The previous prime is 64782161447. The next prime is 64782161497. The reversal of 64782161489 is 98416128746.

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., 64607472400 + 174689089 = 254180^2 + 13217^2 .

It is a cyclic number.

It is not a de Polignac number, because 64782161489 - 2²⁴ = 64765384273 is a prime.

It is not a weakly prime, because it can be changed into another prime (64782161089) 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, 32391080744 + 32391080745.

It is an arithmetic number, because the mean of its divisors is an integer number (32391080745).

Almost surely, 2^64782161489 is an apocalyptic number.

It is an amenable number.

64782161489 is a deficient number, since it is larger than the sum of its proper divisors (1).

64782161489 is an equidigital number, since it uses as much as digits as its factorization.

64782161489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 56.

The spelling of 64782161489 in words is "sixty-four billion, seven hundred eighty-two million, one hundred sixty-one thousand, four hundred eighty-nine".