64977137821579 has 2 divisors, whose sum is σ = 64977137821580. Its totient is φ = 64977137821578.

The previous prime is 64977137821571. The next prime is 64977137821601. The reversal of 64977137821579 is 97512873177946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64977137821579 - 2³ = 64977137821571 is a prime.

It is not a weakly prime, because it can be changed into another prime (64977137821571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32488568910789 + 32488568910790.

It is an arithmetic number, because the mean of its divisors is an integer number (32488568910790).

Almost surely, 2^{64977137821579} is an apocalyptic number.

64977137821579 is a deficient number, since it is larger than the sum of its proper divisors (1).

64977137821579 is an equidigital number, since it uses as much as digits as its factorization.

64977137821579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120210560, while the sum is 76.

The spelling of 64977137821579 in words is "sixty-four trillion, nine hundred seventy-seven billion, one hundred thirty-seven million, eight hundred twenty-one thousand, five hundred seventy-nine".