64075661593 has 2 divisors, whose sum is σ = 64075661594. Its totient is φ = 64075661592.

The previous prime is 64075661563. The next prime is 64075661647. The reversal of 64075661593 is 39516657046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63298534464 + 777127129 = 251592^2 + 27877^2 .

It is a cyclic number.

It is not a de Polignac number, because 64075661593 - 2⁵ = 64075661561 is a prime.

It is a super-4 number, since 4×64075661593⁴ (a number of 44 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64075661593.

It is not a weakly prime, because it can be changed into another prime (64075661543) 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, 32037830796 + 32037830797.

It is an arithmetic number, because the mean of its divisors is an integer number (32037830797).

Almost surely, 2^64075661593 is an apocalyptic number.

It is an amenable number.

64075661593 is a deficient number, since it is larger than the sum of its proper divisors (1).

64075661593 is an equidigital number, since it uses as much as digits as its factorization.

64075661593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 64075661593 in words is "sixty-four billion, seventy-five million, six hundred sixty-one thousand, five hundred ninety-three".