64321321061 has 2 divisors, whose sum is σ = 64321321062. Its totient is φ = 64321321060.

The previous prime is 64321321033. The next prime is 64321321073. The reversal of 64321321061 is 16012312346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58849908100 + 5471412961 = 242590^2 + 73969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64321321061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64321323061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160660530 + 32160660531.

It is an arithmetic number, because the mean of its divisors is an integer number (32160660531).

Almost surely, 2^64321321061 is an apocalyptic number.

It is an amenable number.

64321321061 is a deficient number, since it is larger than the sum of its proper divisors (1).

64321321061 is an equidigital number, since it uses as much as digits as its factorization.

64321321061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 64321321061 in words is "sixty-four billion, three hundred twenty-one million, three hundred twenty-one thousand, sixty-one".