64368466921537 has 2 divisors, whose sum is σ = 64368466921538. Its totient is φ = 64368466921536.

The previous prime is 64368466921523. The next prime is 64368466921609. The reversal of 64368466921537 is 73512966486346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57607432081936 + 6761034839601 = 7589956^2 + 2600199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64368466921537 is a prime.

It is not a weakly prime, because it can be changed into another prime (64368466921237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32184233460768 + 32184233460769.

It is an arithmetic number, because the mean of its divisors is an integer number (32184233460769).

Almost surely, 2^{64368466921537} is an apocalyptic number.

It is an amenable number.

64368466921537 is a deficient number, since it is larger than the sum of its proper divisors (1).

64368466921537 is an equidigital number, since it uses as much as digits as its factorization.

64368466921537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940584960, while the sum is 70.

The spelling of 64368466921537 in words is "sixty-four trillion, three hundred sixty-eight billion, four hundred sixty-six million, nine hundred twenty-one thousand, five hundred thirty-seven".