64987947341 has 2 divisors, whose sum is σ = 64987947342. Its totient is φ = 64987947340.

The previous prime is 64987947337. The next prime is 64987947389. The reversal of 64987947341 is 14374978946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58095460900 + 6892486441 = 241030^2 + 83021^2 .

It is a cyclic number.

It is not a de Polignac number, because 64987947341 - 2² = 64987947337 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64987940341) 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, 32493973670 + 32493973671.

It is an arithmetic number, because the mean of its divisors is an integer number (32493973671).

Almost surely, 2^64987947341 is an apocalyptic number.

It is an amenable number.

64987947341 is a deficient number, since it is larger than the sum of its proper divisors (1).

64987947341 is an equidigital number, since it uses as much as digits as its factorization.

64987947341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 62.

The spelling of 64987947341 in words is "sixty-four billion, nine hundred eighty-seven million, nine hundred forty-seven thousand, three hundred forty-one".