64875115993 has 2 divisors, whose sum is σ = 64875115994. Its totient is φ = 64875115992.

The previous prime is 64875115969. The next prime is 64875115997. The reversal of 64875115993 is 39951157846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64802320969 + 72795024 = 254563^2 + 8532^2 .

It is a cyclic number.

It is not a de Polignac number, because 64875115993 - 2¹⁷ = 64874984921 is a prime.

It is not a weakly prime, because it can be changed into another prime (64875115997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32437557996 + 32437557997.

It is an arithmetic number, because the mean of its divisors is an integer number (32437557997).

Almost surely, 2^64875115993 is an apocalyptic number.

It is an amenable number.

64875115993 is a deficient number, since it is larger than the sum of its proper divisors (1).

64875115993 is an equidigital number, since it uses as much as digits as its factorization.

64875115993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The spelling of 64875115993 in words is "sixty-four billion, eight hundred seventy-five million, one hundred fifteen thousand, nine hundred ninety-three".