64996507237 has 2 divisors, whose sum is σ = 64996507238. Its totient is φ = 64996507236.

The previous prime is 64996507189. The next prime is 64996507297. The reversal of 64996507237 is 73270569946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50730354756 + 14266152481 = 225234^2 + 119441^2 .

It is a cyclic number.

It is not a de Polignac number, because 64996507237 - 2¹⁵ = 64996474469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64996507297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32498253618 + 32498253619.

It is an arithmetic number, because the mean of its divisors is an integer number (32498253619).

Almost surely, 2^64996507237 is an apocalyptic number.

It is an amenable number.

64996507237 is a deficient number, since it is larger than the sum of its proper divisors (1).

64996507237 is an equidigital number, since it uses as much as digits as its factorization.

64996507237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 64996507237 in words is "sixty-four billion, nine hundred ninety-six million, five hundred seven thousand, two hundred thirty-seven".