64696320043 has 2 divisors, whose sum is σ = 64696320044. Its totient is φ = 64696320042.

The previous prime is 64696319969. The next prime is 64696320049. The reversal of 64696320043 is 34002369646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64696320043 is a prime.

It is a super-2 number, since 2×64696320043² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64696320049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32348160021 + 32348160022.

It is an arithmetic number, because the mean of its divisors is an integer number (32348160022).

Almost surely, 2^64696320043 is an apocalyptic number.

64696320043 is a deficient number, since it is larger than the sum of its proper divisors (1).

64696320043 is an equidigital number, since it uses as much as digits as its factorization.

64696320043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 43.

Adding to 64696320043 its reverse (34002369646), we get a palindrome (98698689689).

The spelling of 64696320043 in words is "sixty-four billion, six hundred ninety-six million, three hundred twenty thousand, forty-three".