64238638847 has 2 divisors, whose sum is σ = 64238638848. Its totient is φ = 64238638846.

The previous prime is 64238638787. The next prime is 64238638861. The reversal of 64238638847 is 74883683246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64238638847 - 2¹⁸ = 64238376703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238638147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119319423 + 32119319424.

It is an arithmetic number, because the mean of its divisors is an integer number (32119319424).

Almost surely, 2^64238638847 is an apocalyptic number.

64238638847 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238638847 is an equidigital number, since it uses as much as digits as its factorization.

64238638847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 59.

The spelling of 64238638847 in words is "sixty-four billion, two hundred thirty-eight million, six hundred thirty-eight thousand, eight hundred forty-seven".