64644440626201 has 2 divisors, whose sum is σ = 64644440626202. Its totient is φ = 64644440626200.

The previous prime is 64644440625997. The next prime is 64644440626219. The reversal of 64644440626201 is 10262604444646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54278288064400 + 10366152561801 = 7367380^2 + 3219651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64644440626201 is a prime.

It is not a weakly prime, because it can be changed into another prime (64644440326201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32322220313100 + 32322220313101.

It is an arithmetic number, because the mean of its divisors is an integer number (32322220313101).

Almost surely, 2^{64644440626201} is an apocalyptic number.

It is an amenable number.

64644440626201 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644440626201 is an equidigital number, since it uses as much as digits as its factorization.

64644440626201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 49.

The spelling of 64644440626201 in words is "sixty-four trillion, six hundred forty-four billion, four hundred forty million, six hundred twenty-six thousand, two hundred one".