64359256321 has 2 divisors, whose sum is σ = 64359256322. Its totient is φ = 64359256320.

The previous prime is 64359256277. The next prime is 64359256363. The reversal of 64359256321 is 12365295346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56586894400 + 7772361921 = 237880^2 + 88161^2 .

It is a cyclic number.

It is not a de Polignac number, because 64359256321 - 2¹⁹ = 64358732033 is a prime.

It is a super-2 number, since 2×64359256321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64359250321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32179628160 + 32179628161.

It is an arithmetic number, because the mean of its divisors is an integer number (32179628161).

Almost surely, 2^64359256321 is an apocalyptic number.

It is an amenable number.

64359256321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64359256321 is an equidigital number, since it uses as much as digits as its factorization.

64359256321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 46.

The spelling of 64359256321 in words is "sixty-four billion, three hundred fifty-nine million, two hundred fifty-six thousand, three hundred twenty-one".