64545163237 has 2 divisors, whose sum is σ = 64545163238. Its totient is φ = 64545163236.

The previous prime is 64545163231. The next prime is 64545163259. The reversal of 64545163237 is 73236154546.

It is a happy number.

64545163237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44234923041 + 20310240196 = 210321^2 + 142514^2 .

It is a cyclic number.

It is not a de Polignac number, because 64545163237 - 2¹¹ = 64545161189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64545163231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32272581618 + 32272581619.

It is an arithmetic number, because the mean of its divisors is an integer number (32272581619).

Almost surely, 2^64545163237 is an apocalyptic number.

It is an amenable number.

64545163237 is a deficient number, since it is larger than the sum of its proper divisors (1).

64545163237 is an equidigital number, since it uses as much as digits as its factorization.

64545163237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 46.

The spelling of 64545163237 in words is "sixty-four billion, five hundred forty-five million, one hundred sixty-three thousand, two hundred thirty-seven".