64346003245561 has 2 divisors, whose sum is σ = 64346003245562. Its totient is φ = 64346003245560.

The previous prime is 64346003245549. The next prime is 64346003245583. The reversal of 64346003245561 is 16554230064346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53925244511161 + 10420758734400 = 7343381^2 + 3228120^2 .

It is a cyclic number.

It is not a de Polignac number, because 64346003245561 - 2⁹ = 64346003245049 is a prime.

It is not a weakly prime, because it can be changed into another prime (64346003245501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32173001622780 + 32173001622781.

It is an arithmetic number, because the mean of its divisors is an integer number (32173001622781).

Almost surely, 2^{64346003245561} is an apocalyptic number.

It is an amenable number.

64346003245561 is a deficient number, since it is larger than the sum of its proper divisors (1).

64346003245561 is an equidigital number, since it uses as much as digits as its factorization.

64346003245561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 64346003245561 in words is "sixty-four trillion, three hundred forty-six billion, three million, two hundred forty-five thousand, five hundred sixty-one".