64687278379 has 2 divisors, whose sum is σ = 64687278380. Its totient is φ = 64687278378.

The previous prime is 64687278361. The next prime is 64687278443. The reversal of 64687278379 is 97387278646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64687278379 - 2⁵ = 64687278347 is a prime.

It is not a weakly prime, because it can be changed into another prime (64687278179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343639189 + 32343639190.

It is an arithmetic number, because the mean of its divisors is an integer number (32343639190).

Almost surely, 2^64687278379 is an apocalyptic number.

64687278379 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687278379 is an equidigital number, since it uses as much as digits as its factorization.

64687278379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170698752, while the sum is 67.

The spelling of 64687278379 in words is "sixty-four billion, six hundred eighty-seven million, two hundred seventy-eight thousand, three hundred seventy-nine".